ansiasme b1.2-1983 (revision of ansi b1.2-1974).pdf

8/10/2019 ANSIASME B1.2-1983 (REVISION OF ANSI B1.2-1974).pdf

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VALI DATI ON NOTI CE123 Mar ch 1990ANSI / ASME B1. 2- 198316 May 1983

ANST/ ASME Bl . 2- 1983, adopt ed on 25 Oct ober 1984, has been r evi ewed nd det erm nedt o be cur r ent .

Cust odi ans:Ar my - ARNavy - ASAi r Force -11

Revi ew Act i vi t i es :.r. Ar my - AT, AV, GL, ME

User Act i vi t y:Navy - EC

Ci vi l Agency Coor di nat i ng Act i vi t i es:Commer ce - NI STDOT - ACO, APM, FAA, FRA, NHTGSA - FSS, PLDHUD - HSRSJ us t i ce - FPINASA - J FK, LRC, MSFUSDA - AFS

Pr epar i ng Act i vi t y:

DLA - IS

AREA THDS

DI STRI BUTI ON STATEMENTA. Appr oved f or publ i c r el ease; di st r i but i on s unl i m t ed.

YRIGHT merican Society of Mechanical Engineerssed by Information Handling Services

YRIGHT American Society of Mechanical Engineerssed by Information Handling Services


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Erratato

ANSI/ASMEBl.2-1983

The Errata correction listed belowappliesto ANSI/ASMEB1.2-1983,Gages and Gagingfor Unified Inch Screw Threads.

Page Location Change

87 Table 11 Under column 8, change thirdntry from .3744 o.3739

MAY1992THE AMERICANSOCIETYOF MECHANICALENGINEERS

345 East 47th Street, NewYork, N.Y. 10017 N0058E


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A N

ASME B L - 2 8 3

A M E R I C A N

2 5 7 5 5 3 2 0 0 3 3 b 5 143 - b

N A T I O N A LS T A N D A R D

Gages and Gaging for

Unified Inch Screw Threads

ANSI/ASMEB1.2-1983( R E V I S I O NOF A N S I B1.2-1974)

S P O N S O R E DA N DP U B L I S H E DB Y

T H E M E R I C A N O C I E T Y O F M E C H A N I C A L N G I N E E R S

U n i t e dn g i n e e r i n g e n t e r 3 4 5 East 4 7 t h t r e e t e w o r k , N. Y. 1 001 7

7YRIGHT merican Society of Mechanical Engineerssed by Information Handling Services



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This Standard wi ll be revised when the Society approves the issuance of a new edition. There willbe no addenda o r written interpretations of the requirements of this Standard issued to this Edition.

Date of Issuance: June 15, 1984

This code or standard was developed under procedures accredited s meeting the criteri a for Am eri-

can National Standards. The Consensus Committee tha t approved the code or standard was balancedto assure that individuals from competent and concerned interests have had an pportunity to partici-pate. The proposed code or standard was made available fo r publ ic review and comment which pro-vides an opportunity for additional pu blic inpu t fro m industry, academia, regulatory agencies, and inthe public-at-large.

ASME does no t "approve," rate," or endorse" any tem, construct ion, proprietary device, oractivity.

ASME does not take any position wi th respect to the valid ity of any patent rights asserted in con-nectio n with any items mentioned in this document, and does not undertake o insure anyone utili zinga standard against liability for infringement of any applicable Letters Patent, nor assume any such lia-bili ty. Users of a code or standard are expressly advised that determination of the val idi ty of any suchpaten t rights, and the risk of infringem ent of such rights, is entirely their own responsibility.

Partic ipation by federal agency representative(s) or person(s) affilia ted with indus try is not to be in-terpreted as government or ndus try endorsement of this code or standard.

ASME does not accept any respo nsibil ity fo r interp retatio ns of this document made by individualvolunteers.

No par t of this document may be reproduced in any form,in an electronic retrieval system or otherwise,

without the prior written permission of the publisher,

Copyright 0 1984 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERS

Al l Rights ResewedPrinted in U.S.A.




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ASME B I - 2 8 3 2 5 7 5 5 1 2 OOll1653 2

FOREWORD

(This Foreword is no t partof American Nat ional Standard ANSVA SME61.2-1983,Gages and Gaging for Un ified Inch Screw Threads.)

American National Standards Committee B1 for the Standardization of screw threadswas organized in 1920 as Sectional Committee B1 under the aegis of the American Engi-neering Standards Committee (later the American National Standards Association, thenthe United States of America Standards Institute and, as of.October 6, 1969, the AmericanNationa l Standards Institute, Inc.), with the Society of Automotive Engineers and theAmerican Society of Mechanical Engineers as. oint sponsors.

In 1982, American National Standards Committee B1 was reorganized as the ASMEStandards Committee BI, and since then it has operated under the American Society ofMechanical Engineers Procedures t o produce and update standards which may becomeANSI Standards after final approval by the American National Standards Institute.

A declaration of accord with respect to the unification of screw threads was signed onNovember 18, 1948, by representatives of the services and industry of the United States,the United Kingdom, and Canada. The ANSI Unified Screw Thread Standard BI. , throughthe quadripartite standardization greement (QST AG) 247, Unified Threads, is subject toan international standardization agreement through the instrumentality of the American-British-Canadian-Australian Army Standardization Program, which recognizes BI. I asa standard for Unified Threads when it is required to effect the interchangeability of partsand equipment between the armies of the participating nations.

The first American National Standard for Screw Thread Gages and Gaging was pub-lished as ASA B1.2-1941 to supplement the parent Standard SA B1.l-1935, ScrewThreadsfor Bolts, Nuts, Machine Screws and Threaded Parts. That Standard was revised and re-published as a Unified Standard ASA Bl.1-1949 and again as ASA Bl.1-1960. The Uni-fied Gage Standard was republished as ASA B1.2-1951 and USA B1.2-1966.

On February 9, 1973, a meeting was held by the Department of Commerce at the Na-tional Bureau of Standards, Washington, D.C., attended by representatives of governmentand industry screw thread interests. With the goal of eliminating parallelstandards, thoseat the meeting recommended that the NBS Handbook H-28 be converted into a coordinat-ing document for government screw thread standards wherein sections of H-28 would bereplaced by single page references to existing industry standards. It was further recom-mended that the chairman of American Nationa l Standards Committee B1 set up a groupto clearly define and establish identified levels of acceptability for screw threads.

At an American National Standards Committee 1 meeting held on May 3, 1973, unani-mous approval was given to t he following motion: The BI Committee recognizing theneeds of industry for different levels of acceptability for screw threads, establishes newscopes for Standards B 1.1 and B 1.2 and sets up a new standard, B 1.3. References to con-formance criteria were removed from ANSI B1.2-1974 and additional gages and gagingdata were added to suit additional conformance requirements specified in ANSI B1.3 orother B1 thread documents.

This new publication, designated ANSIIASME B1.2-1983, has had considerable newmaterial added to cover the many options of gages and measuring equipment shown inANSI B1.3, Screw Thread Gaging Systems for Dimensional Acceptability. I t has also re-

...111




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ASME B 3 - 2 83 2 5 7 5 5 3 2 OOL365q L

applied HI and LO to function as NOT GO gages and has eliminated gages with pitch di-ameter outside product thread limits. ANSI B1.2 was approved by the ASME StandardsCommittee B1 on March 18, 1983.

The proposed standard was submitted by the ASME Board of Standardization to theAmerican National Standards Institute. It was approved and formally designated anAmerican National Standard on May

16, 1983.

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ASME STANDARDS COMMITTEE B IStandardization and Unification of Screw Threads

(The following is the rosterf the Committee at the t ime of approval ofthis Standard.)

OFFICERS

D. J. Emanuelli,Chairman H. W. Ellison,Vice hairmanC. E. Lynch,Secretary

COMMITTEE PERSONNEL

AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC.G. G . Gerber, McDonnell Douglas, St. Louis, M issouriH. Borrman,Alternate, Sperry Gyroscope Division, Grea t Neck, Ne w York

AMERICAN IRON AND STEEL INSTITUTEF. Dallas, Jr., Saw hill Tu bular Division, Sharon, P ennsylvania

AMERICAN MEASURING TOO L MANUFACTURERS ASSOCIATIOND. Dodge, Pennoyer-Dodge Company, Glendale, CaliforniaC . W. Jatho, Alternate, Ame rican Measu ring Tool Manufacturers Association, Birmingham, Michigan

AMERICAN PIPE FllT lNG S ASSOCIATIONW. C. Farrell, Stockham Valves and Fittings, Birmingham, Alabama

DEFENSE INDUS TRIAL SUPPLY CENTERE. Schw artz, Defense Industria l Supp ly Center, Philadelphia, P ennsylvaniaF. S . Ciccarone,Alternate, Defen se Industrial Supply Center, Philadelphia, Pennsylvania

ENGINE MANUFACTURER S ASSOCIATIONG.. A. Russ, Cum mins Engine Company, Columbus, Indiana

FARM AND INDUSTRIAL EQUIPMENT INSTITUTEJ. F. Nagy, Ford.Motor Company, Dearborn, Mich igan

INDUST RIAL FASTENERS INSTITUTER . B. Belford , Indus trial Fasten ers Institute, Cleveland, OhioR. M. Harris, Bethlehem Steel Company, Lebanon, PennsylvaniaK . E. Mc Cullo ugh , SPS Technologies, Inc., Je nkintown, PennsylvaniaJ. C. Mc Mu rray , Russell, Burd sall and Wa rd nc., Mentor, OhioJ. A. Trilling, Holo-Krome Company, We st Hartford, ConnecticutE. D. Spengler, Alternate, Bethlehem Steel Company, Lebanon, Pennsylvania

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FllTlNG INDUSTRYW. C. Farrell, Stockham Valves and Fitting, Birmingham, Alabama

MET AL CUTTING TOOL INSTITUTE (TAP AND DIE DIVISION)N. F. Nau, Union/Butterfield, Athol, MassachusettsA. D. Shepherd,Jr., Alternate, Union/Butterfield, Derby Line, Vermon t

NATIO NAL AUTOMATIC SPRINKLER AND FIRE CONTROL ASSOCIATION, INC.W. Testa, Grinne ll Fire Protec tion System s Company, Inc., Providence, Rhode IslandR . P. Fleming,Alternate, Nationa l Automa tic Sprinkler and Fire Co ntrol Asso ciation, nc., Patterson, N ew York

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A S M E 8 3 . 2 83 M 2 5 9 5 5 3 2 0 0 1 3 6 5 b 8 M

NATIO NAL ELECTRICAL MANUFACTURERS ASSOCIATIONJ. L. Griffin, W heatland Tube Company, Wheatland, PennsylvaniaJ. B. Levy, G eneral Electric Company, Schenectady, N ew YorkF. F. Weingruber, Westinghouse Electric Corp., Pittsburgh, PennsylvaniaW . R . Williford,Alternate National Electrical M anufacturers Association, W ashington, D.C.

NATIONAL MACHINETOOL BUILDERS ASSOCIATIONR . J. Sabatos, The Cleveland Twist Drill Company, Cleveland, OhioD. R . Stoner, Jr., Teledyne Landis Mach ine, Wayneshoro, Pennsylvania

NATIONAL SCREW M ACHIN E PRODUCTS ASSOCIATIONT. S . Meyer, Fischer Spe cial Manuf actu ring Company, Cold Spring, KentuckyH. A . Eichstaedt,Alternate Nationa l Screw Ma chine Produc ts Association, Brecksville, Ohio

SOCIETY OF AUTOMOTIVE ENGINEERSH. W. Ellison, General Motors Technical Center, Warren. M ichigan

SOCIETY OF MANUFACTURING ENGINEERSD. Davidson, Morse/Hem co Corporation, Holland, Michiga n

TUBULAR RIVET AND MACHINE INSTITUTER . M. Byrne, Indus try Service Bureaus, Inc., Wh ite Plains, New York

U.S. DEPARTMENT OF THE AIR FORCER . P. Stewart, Wright-Patterson, Ohio

U S . DEPARTMENT OF THE ARM YF. J. Clas, U S . Department of the Army, W atervliet, N ew YorkJ. Crowley, US. Arm y Mater ia lDevelopment and Readiness Command, Alexandria, VirginiaF. L. Jones,Alternate U.S. Army Missle Command, Redstone Arsenal, Alabama

U S . DEPARTMENT OF DEFENSEE. Schwartz, Defense Industrial Supply Center, Philadelphia, Pennsylvania

U. S. DEPARTMENT OF THE NAVYC. T. G ustafson, Portsmouth Naval Shipyard, Portsmouth, New Hampshire

INDIVIDUAL MEMBERSC. T. Appleton, Jefferson, Massachusetts

J. Boehnlein, PMC Industries, Wickliffe, OhioR . Browning , Southern Gage Company, Erin, TennesseeR . S. Cham erda, The Johnson Gage Company, Bloomfield, ConnecticutJ. F. Cramer, Des Moines, WashingtonE. W. Dresc her, Lancaster, PennsylvaniaD. J. Emanuelli, Greenfield Tap and Die, Greenfield, MassachusettsC . G. Erickson, Colt Industries- terling Die Operation, West H artford, ConnecticutS. I. Kanter, P.E., The Hanson-Whitney Company, Hartford, ConnecticutR . W. Lamp ort, Th e V an Keuren Company, Watertown, MassachusettsA. R . Machell,Jr,, Xerox Corp., Rochester, Ne w YorkA. E. Masterson, Watervliet, New YorkR . E. Mazzara, Ge ometric Tool, Ne w Haven, ConnecticutP. V. Pastore, Regal Beloit Corp., So uth Beloit, IllinoisM. M. Schu ster, Hi-She ar Corporation, Torrance, CaliforniaA. G. Strang, Boyds, MarylandA. F. Thibodeau, Swanson Tool Man ufacturing, lnc., We st Hartford, ConnecticutJ. W. Turton, The Bendix Corp., Greenfield, Massachusetts

Subcommittee B I.2 - Screw Thread Gages and Gaging

R . Browning,Chairman Southern Gage Company, Erin, TennesseeA . F. Thibodeau,Secretary Swanson Tool Manufacturing, Inc., West Hartford, ConnecticutP. F. Bitters, Greenfield Tap and Die, Greenfield, MassachusettsJ. Boehnlein, PMC Industries, Wickliffe, Ohio

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D. Cadieux, Greenfi eld Tap and Die, Greenfield, MassachusettsR . S. Chamerda, The Johnson Gage Company, Bloomfield, ConnecticutM. Davidson, Morse /Hemco Corp.. Holland, MichiganD. Dodge, Pennoyer-Dodge Company, Glendale, CaliforniaH. W. Ellison, General Motors Technical Center, Warren, MichiganJ. J. Fiscella, Latham, New YorkG. Garcina, Indianapolis, IndianaC. T. Gustafson, Metrology Laboratories Division, Portsmouth, New HampshireS. 1. Kanter, The Hanson-Whitney Company, Hartford, ConnecticutR . W. Larnport, The Van Keuren Company, Watertown, MassachusettsA. E. Masterson, Watervliet, New YorkK. E. McCullough, SPS Technologies, Inc., Jenkintown, PennsylvaniaJ. C. McMurray , Russell, Burdsall and Ward, Inc., Mentor, OhioJ. Preziosi, Amerace-Esna Corp., Union, New JerseyM. M. Schuster, Hi-Shear Corp., Torrance, Califo rniaE. Schwarfz , Defense Industri al Supply Center, Philadelphia, PennsylvaniaA. G. Strang, Boyds, MarylandJ. W. Turton, The Bendix Corp., Greenfield, MassachusettsA. Zaverucha, McM ellon Brothers, Stratford, Connecticut

Task Group B I.I - Gages and Gaging for Metric M Screw Threads

C. G . Erickson, Chairman, West Hartford, ConnecticutR . Browning, Secretary, Southern Gage Company, Erin, TennesseeR. S. Charnerda, The. Johnson Gage Company, Bloomfield, ConnecticutM. Davidson, H. E. Morse Company, Holland, Mich iganD. Ernanuelli , Greenfield Tap and Die, Greenfield, Massachuse ttsS. 1. Kanter, The Hanson-Whitney Company, Hartford, ConnecticutR . W. Lamport, The Van Keuren Company, Watertown, MassachusettsK. E. McCullough , SPS Technologies, Inc., Jenkintown, PennsylvaniaJ. C. McMurray, Russell, Burdsall, and Ward, Inc., Mentor, OhioE. Schwartz, Defense Industrial Supply Center, Philadelphia, PennsylvaniaA. G. Strang, Boyds, Maryland

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A S M E B I - 2 83 m 2 5 7 5 5 3 2 0033658 3 m

CONTENTS

...Foreword ........................................................................111Standards Committee Roster ....................................................... V

1 Introduction ................................................................ 11.1 References ............................................................. 11.2 Classification ........................................................... 11.3 Federal Government Use ................................................. 1

2 Basic Princi ples ............................................; ................ 12.1 Accuracy in Gaging ..................................................... 12.2 Limitations of Gaging ................................................... 12.3 Determining Size of Gages ............................................... 102.4 Standardemperature ................................................... 10

3 General Practice ............................................................ 103.1 General Design ......................................................... 103.2 Types of Gages ......................................................... 103.3 Interpretation of Tolerances .............................................. 103.4 Direction of Tolerances on Gages .......................................... 103.5 Standard hread Gage Tolerances ......................................... 113.7 Tolerances on Half-Angle ................................................ 113.8 Check of Effect of Lead and Flank Angle Variations on Product Thread ....... 113.9 Calibration Requirements and tandards ................................... 11

3.6 Tolerance on Lead ......................................................11

4 Types of Gages for Product Internal Thread ..................................4.1 GO Working Thread Plug Gages ..........................................4.2 NOTGO (HI) Thread Plug Gages .........................................4.3 Thread Snap Gages - O Segments or Rolls ..............................4.4 Thread Snap Gages - OT GO (HI) Segments or Rolls .....................4.5 Thread Snap Gages Minimum Matehal: Pitch Diameter Cone and

4.6 Thread Snap Gages - Minimum Material: Thread Groove DiameterVee ..................................................................Type

................................................................4.7 Thread-Setting Solid Ring Gages ..........................................

4.9 Snap and Indicating Gages to Check Major Diameter of Internal Thread .......4.10 Functional Indicating Thread Gages for Internal Thread ......................4.11 Minimum-Material Indicating Thread Gages for Internal Thread ...............4.12 Indicating Runout Thread Gage for Internal Thread .........................4.13 Differential Gaging ......................................................

4.8 Plain Plug. Snap. and Indicating Gages to Check Minor Diameter ofInternalThread .......................................................

1111131420

20

2324

242828333337

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4.14 Pitch Micrometers ......................................................394.15 Thread-M.easuring Balls .................................................. 394.16 OpticalComparator nd Toolmakers Microscope ........................... 394.17 Profile racingnstrument ............................................... 404.18 Surface Roughness Equipment ............................................ 404.19 Roundness quipment ................................................... 404.20 Miscellaneous Gages and Gaging Equipment ................................ 40

5 Types of Gages for Product External Thread .................................. 405.1 GOWorkingThread Ring Gages .......................................... 405.2 NOT GO (LO) Thread Ring Gages ........................................ 1285.3 Thread Snap Gages O Segments or Rolls .............................. 1295.4 Thread Snap Gages - OTGO (LO) Segments or Rolls .................... 1315.5 ThreadSnap Gages one nd Vee ...................................... 1335.6 Thread Snap Gages - Minimum Material: Thread Groove Diameter Type ..... 1335.7 Plain Ring and Snap Gages to Check Major Diameter of Product

ExternalThreads ......................................................1335.8 Snap Gages for Minor Diameter of Product External Threads ................. 1355.9 Functional ndicating Thread Gages for External Thread ..................... 1355.10 Mimimum-Material ndicat ing Thread Gages for External Thread ............. 1395.12 Differential Gaging ...................................................... 1395.13 WToleranceThread-Setting Plug Gages ................................... 1435.14 Plain Check Plug Gages for Thread Ring Gages ............................. 148

ExternalThreads ...................................................... 1485.16 Indicating Gages to Check Minor Diameter of External Thread ...............1485.17 Thread Micrometers .................................................... 1595.18 Thread-Measuring Wires ................................................. 1595.19 Optical Comparator nd Toolmakers Microscope ........................... 1595.20 Profile Tracing nstrument ............................................... 1605.21 Electromechanical Lead Tester ............................................ 1605.22 Helical Path Attachment Used With GO Type Thread Indicating Gage ......... 1605.23 Helical Path Analyzer ...................................................1605.24 Surface Roughness Equipment ............................................ 1615.25 Roundness Equipment ...................................................1615.26 Miscellaneous Gages and GagingEquipment ................................ 161

5.11 Indicating Runout Gage for ExternalThreads .............................. 139

5.15 Indicating Plain Diameter Gages - Major Diameter of Product

Figures1Maximum-Material GOFunctional Limit ......................................... 122PartialEndThreadsand Chip Grooves ........................................... 143 NOTGO HI) Functional Diameter Limit ........................................ 164ThreadSnap Gages - Maximum-Material GO Functional Limit ................... 195Thread Snap Gages - OT GO HI) Functional Diameter Limit ................... 216 Thread Snap Gages - Minimum-Material Pitch Diameter Limit - one and Vee ..... 227Thread Snap Gages Minimum-Material Thread Groove Diameter Limit ........... 238Thread Form of Solid Thread-Setting Ring Gages .................................. 269MinorDiameter Limit - ylindrical Plug Gages .................................. 27

10 Indicating Plain Diameter Gages - Max.-Min. Minor Diameter Limit

11 Snap and Indicating Diameter Gages - Max.-Min. Major Diameterand Size ................................................................... 29Limit and Size .............................................................. 30

X




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A S M E B L . 2 83 W 2595512 O O l l b b O T

1213

14

1516

17181920212223242526

27

28

29303132333435

Indicating Thread Gages.

aximum-Material GO Functional Limit and Size ......Indicating Thread Gages

.inimum-Material Pitch Diameter Limit and

Size.

one and Vee .......................................................Indicating Thread Gages

.inimum-Material Pitch Diameter Limit

and Size-BallandR adius .................................................Indicating Thread Gages - iameter Runout - Minor to Pitch .....................Indicating Thread Gages - ifferentlal Gaging ........: .........................Inside Micrometer, Caliper Type ................................................Maximum..M aterial GO Functional Limit ........................................NOT GO (LO) Functional Diameter Limit .......................................Thread Snap Gages - Maximum-Material GO Functional Limit ...................Thread Snap Gages - OT GO (LO) Functional Diameter Limit ...................Thread Snap Gages - Minimum-Material Pitch Diameter Limit one and Vee .....Thread Snap Gages - Minimum-Material Thread Groove Diameter Limit ...........Major Diameter Limit .........................................................Minor Diameter Limit Snap Type ................................................

and Size ...................................................................andsize-ConeandVee ....................................................Limit and Size ..............................................................

Indicating Thread Gages - Maximum-Material GO Functional Diameter Limit

Indicating Thread Gages - Minimum-Material Pitch Diameter Limit

Indicating Thread Gages Minimum-Material Thread Groove DiameterIndicating Thread Gages - iameter Runout - Major to Pitch .....................Indicating Thread Gages - ifferential Gaging ...................................Thread Form of Truncated Thread-Setting Plug Gages .............................Thread Form of Full-Form Thread-Setting Plug Gages ............................Indicating Plain Diameter Gage - Max.-Min. Major Diameter Limit and Size ........Indicating Diameter Gages - Max.-Min. Minor Diameter Limit and Size ............

Indicating Gage ..............................................................ndicating Gages - elical Pa th Attachment Used With GO Type

31

34

353638

39127129130132134135136137

138

140

141142144146147149150

160

Tables1 Screw Thread Gages and Measuring Equipment for External Product

2 Screw Thread Gages and Measuring Equipment for Internal ProductThread Characteristics ...................................................... 2Thread Characteristics ...................................................... 6

3 Recommended Widths for Chip Grooves ........................................ 13Threaded andPlain Gages for Unified External and nternal Threads ............. 15Setting Gages for Unified Thread Working Gages .............................. 17

6 X Gage Tolerances for Thread Gages ............................................ 187W Gage Tolerances for Thread Gages ........................................... 259Constants orComputingThread Gage Dimensions ............................... 32

Screw Threads - imits of Size ............................................. 41and 3B Unified Screw Threads - imits of Size ............................... 83

4 Specifications and Format for Tables 10 and 11 - imits of Su e of

5 Specifications and Format for Tables 10 and 11 - imits of Size of Thread-

8 Gage Tolerances for Plain Cylindrical Gages ..................................... 2810 Gages for Standard Thread Series. Classes 1A. 2A. 3A. 1B. 2B. and 3B Unified

11 Setting Gages for Standard Thread Series. Classes 1A. 2A. 3A. 1B. 2B.

12 Calibration Requirements and Standards for X Tolerance Thread Gages.Indicating Gages. Plain Gages. and Measuring Equipment for ExternalProductThreads ............................................................ 151

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13 Calibration Requirements and Standards for X Tolerance Thread Gages.Indicating Gages. Plain Gages. and Measuring Equipment for InternalProducthreads ...........................................................155

14 Calibration Requirements for Thread- andPlain-Setting Gages ..................... 159

AppendicesA Calibration and Inspection of Limit Gages. Snap Gages. Indic ating Gages.

and Measurin g InstrumentsAl General ................................................................163A2 Thread lug Gage Calibration ............................................ 163A3 ThreadRing Gage Inspection ............................................ 164A4 Plain lug Gage Calibration ............................................. 167A5 PlainRing Gage Calibration ............................................. 168A6 Plain nap Gages ....................................................... 168A7 Rolls With Zero Lead Thread Form Used on Snap and Indicating

Gages ............................................................... 168A8 Inspecting Peripheral Contact ing Segments Used on External

ProductThread ...................................................... 168A9 Inspection of Thread Contact Segments Used on

InternalProductThread ............................................... 170A10 Check for Magnification Discrepancies Due to Indicating

System Linkage ...................................................... 170Al 1 Calibration of Dial nd Electronic Indicators .............................. 170A12 Assessment of Surface Quality ........................................... 171

B Metrology of 60 deg . Screw Threads ........................................ 173B1 Wire Method of Measurement of Pitch Diameter (Thread Groove

Diameter) ..................................... i ...................... 173B2 Size of Wires ........................................................... 173B4 Methods of Measurement Using Wires .................................... 176B5 Standard Specification for Wires and Standard Practice in Measurement

of Wires of 60 deg Threads ............................................ 176B6 General Formula or Measurement of Pitch Diameter ....................... 177B7 Simplified Formula for Pitch Diameter .................................... 177B8 Setting Measuring Instruments With Variable Measuring Force ............... 178B9 Thread Balls ...........................................................178B10 Internal itch Diameter Measurement ..................................... 179

B3 Methods of Measuring Wires Considering the Effect of Deformation .......... 173

FigureB1 A Three-Wire Method of Measuring Pitch (Thread Groove)

Diameter of Thread Plug Gages ............................................. 174TablesAl Minimum Magnification .......................................................164A2 60 deg . Included Thread Angle ................................................. 165A3 Lengths of AGD Taperlock and Trilock Thread Plug Gage Blanks

A4 Lengths of AGD Thread Ring Gage Blanks and Total Thread LengthsSelected From ANSI B47.1 .................................................. 166of Standard Truncated-Setting Plug Gage Blanks Selected from ANSIB47.1 .....................................................................169

B1 Thread-Measuring Wires for 60 deg Screw Threads .............................. 175and Wire Calibration. and Cylindrical Diameter for Wire Calibration . . . . . . . . . . . . . . . . . . . .176Measurement nd Ball Calibration ........................................... 179

B2 Measuring Force for Over-Wire Measurements of External Pitch Diameter

B3 Measuring Force Over Balls for Internal Pitch Diameter

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ANSI/ASME 61.2-1983ANAMERICANNATIONAL STANDARD

AN AMERICAN NATIONAL TANDARD

GAGES AND GA GING FOR UNIFIED INCH SCREW THREADS

1 INTRODUCTION

This Standard provides essential specifications anddimensions for the gages used on Unified inch screwthreads (UN and UNR thread form), and covers thespecifications and dimensions for the thread gagesand measuring equipment listed in Tables 1 and . Thebasic purpose and use of each gage are also described.

1 ,I References

The latest editions of the following documents forma part of this Standard, to he extent specified herein.

American National StandardsANSI B1.l

ANSI B1.3

ANSI B1.7

ANSI B46.1

ANSI B47.1ANSI B89.1.6

ANSI B89.1.9

ANSI B89.3.1

Unified Inch Screw Threads (UNand UNR Thread FormScrew Thread Gaging Systems forDimensional AcceptabilityNomenclature, Definitions, andLetter Symbols for Screw ThreadsSurface Texture: Surface Rough-

ness, Waviness, and LayGage BlanksMeasurement of Qualified PlainInternal Diameters for Use asMaster Rings and Ring GagesPrecision Inch Gage Blocks forLength Measurement (Through 20in.)Measurement of Out-of-Round-ness

for Federal Services, Section 6, the use of this Stan-dard by the federal government will be subject to all re-quirements and limitations of FED-STD-H28/6.

2 BASIC PRINCIPLES

2.1 Accuracy n GagingThread plug gages are controlled by direct measur-

ing methods. Thread ring gages, thread snap limitgages, and indicating thread gages are controlled byreference to the appropriate setting gages or directmeasuring methods or both.

2.2 Limi tations of Gaging

2.2.1 Product threads accepted by a gage of onetype may be verified by other types. It is possible,however, that parts which are near a limit may be ac-cepted by one type and rejected by another. Also, itis possible for two individual limit gages of the sametype to be at opposite extremes of the gage tolerancespermitted, and borderline product threads acceptedby one gage could be rejected by another. For thesereasons, a product screw thread is considered accep-table when it passes a test by any of the permissiblegages in ANSI B1.3 for the gaging system specified,provided the gages being used are within the toler-ances specified in this Standard.

1.2 Classification

In this Standard, the term NOT GO, previouslyknown as H I and LO, is used to identify functionaldiameter thread gages.

1.3 Federal Governm ent Use

When this Standard is approved by the Depart-ment of Defense and federal agencies and is incorpo-rated into FED-STD-H28/6, Screw Thread Standard

I

2.2.2 Gaging large product external and internalthreads equal to or greater than 6.25 in. nominal sizewith plain and threaded plug and ring gages presentsproblems for technical and economic reasons. Inthese instances, verification-may be based on use ofmodified snap or indicating gages or measurement ofthread elements. Various types of gages or measur-ing devices in addition to those defined in this docu-ment are available and acceptable when properly cor-related to this Standard. Producer and user shouldagree on the method and equipment used.




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GAGES AND GAGING FORUNIFIED INCH SCREW THREADS

- \

ANSVASME 61.2-1 983AN AMERICAN NATIONAL STANDARD

TABLE1 SCREW THREAD GAGES AND MEA SURING EQUIPMEN T FOREXTERNAL PRODUCT THREAD CHARACTERISTICS

T Unif ied Inch ThreadsNOT GO

FunctionalDiam.

MaximumMaterial

COI

--uric.

LimitFunc. Func.Limit I Sizehread Gages

andMeasuring Equipment

1 Split or Solid Threaded Rings (ANSI847.1)1.1 GO

1.2 NOT GO (LO) e

2 Thread Snap Gages2.1 G O segments

2.2 NOT G O (LO) segments

2.3 G O rolls

2.4 N O T G O (LO) rolls e

2.5 Mi ni mu m material - itch diameter type-cone and ee

2.6 M in im um material -th read groove diametertype - one only

3 Plain Diameter Gages3.1 Plain cylindrical ring for major diameter

3.2 Majo r diameter snap type

3.3 Mi no r diameter snap type

3.4 Maximum and minimum major diameter nap type

3.5 Maximum and min imum minor diameter nap type

4 Indicating Thread GagesHaving either two contacts at 180 deg. or three contactsa t 120 deg.4.1 G O segments ee

e e.3 G O rolls e

4.5 Minimum mater ia l -p i tchdiameter type-coneandvee4.6 M in im um material - hread groove diameter type

- one only

4.7 Maj or diameter and pitch diameter runout age

2




16/190

GAGES AND GAGING FORUNIFIED INCH SCREWTHREADS

' ASME 8 1 . 2 83 W 2 5 7 5 5 1 2 0011664 7 =A N S VA S M E61.2-1 983

. AN AMERICAN NATIONAL STANDARD

3

-7

SurfaceTexture

N




17/190

A S M E 81.2 8 3 2 5 7 5 5 3 2 0 0 1 L b b 5 9

ANSIIASME B1.2-1983AN AMERICAN NATIONALSTANDARD

GAGES AND GAGING FORUNIFIED INCHSCREW THREADS

TABLE1 SCREW TH READ GAGES AND MEA SURING EQUIPMEN T FOREXTERNAL PRODUCT T HREA D CHA RAC TERISTICS (CONT'D)

T Unified Inch ThreadsT Minimu m Materialaximum

Material

GO

NOT GOFunctionalDiameter Thd. GrooveDiam.itch Diam.

FuncSize

Func.l i m i t

Func. Func.limit Sizehread Gages

andMeasuring Equipment

l imit

C1

-

.8 D i ff e r e n t i a l s e g m e n t o rroll

( G O p r o f i l e f o r o n e p i t c hn length) used in com binat ionwith aG O i n d i c a t i n g g a g e t o y i e l d a d i a m e t e r e q u i v a l e n tfor variation in lead (including uniformityof helix);and a minimum mater ia l ind ica t ing gage to y ie ld ad iameter equiva lent for var ia t ion n f lank angle

5 ndicating Plain Diame terGages5 .1 Major d iameter type

5 .2 M i n o r d i a m e t e r t y p e

6 Pi tch Microme ter With S tandard Contac ts Approxim ate ly

~ ~~~~~

NOT G O (LO) P ro fi le ] C o n e a n dVee

7 Pitch MicrometerWithModif iedContac ts Approximate lyP it ch D i a m e t e r C o n t a c t ] C o n e a n d Ve e

8 Thread-Measur ing Wires With Sui tab le Measur ing Means e

e eO p t i c a l C o m p a r a t o r a n d To o l m a k e r ' s M i c r o s c o p e Wi t hSuitable Fixturing

1 0 Profile Tracing Equipmen t With Suitable FixturingA

11 Lead MeasuringMachineWithSuitableFixturing

1 2 Hel ica l Pa th At tachment Used With GOType Indica t ing Gage

i3HelicalPathAnalyzer1 4 P la in M i c r o m e t e r a n d C a l i p e r s- Modif ied As Requi red

1 5SurfaceM e a s u r i n gE q u i p m e n t

46 R o u n d n e s sq u i p m e n t I LNOTE:(1) Maximum minor d iameter l imi t is a c c e p t a b l e w h e n p r o d u c t p a s s e s G O g a g eon U N and UNR threads .

4




18/190

ASME B L - 2 8 3 2 5 7 5 5 3 2 O O L l b b b 0 m

ANSVASME B1.2-1983AN AMERICAN NATIONAL STANDARD

i

1

o1

1

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1

1

RIGHT merican Society of Mechanical Engineers

d by Information Handling Services

RIGHT American Society of Mechanical Engineers



68/190

ASME B 1 . 2 83 m 2 5 7 5 5 1 2 0 0 11 7 1 b 0 m

GAGES AND GAGING FORUNIFIED NCH SCREW THREADS

ANSIIASME B1.2-1983AN AMERICAN NATIONAL STANDARD

VI

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w h hr r r rr r r r

0 w . o wo w m rm m m wm m wT r r rr r r r

o w o wo w m mo m m mw m m mr r r r .r r r r

o w o wO C O N O

r r. 1 r3 % F 4r r r r

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o w o wo w r mh w m br r r rm m m mr r r r

o w o w o mo w o w m mm N m N N WN N N N r rr ~ . ~ . r : r rr r r r r r

O N O No r o r

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r r r rr r r r

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r r r r. . . .

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w o o wo o m mm w h hr r r 7r r r r

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69/190

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1- 2 38 -1B 2 3 2 3 2 3 2 3 2 38 2 3B






70/190

GAGESANDGAGlVG FORUNIFIED INCH SCREW THREADS

ANSI /ASME B1.2-1983A NAMERICANNATIONALSTANDARD

m m~m m m~m m m~m m m~m m m~m

o w o w

m m m mN N N N

o w m rm w m mO W O Wm w o ow w w wo w m m

N N N . Nr r r r

o w o wO W N 0

h W W W

r r r r

o m w wN Y ? ?

o w o w oo w o w 3 >W N M N W Wo o o o m c1111?Nr r r r r r

o w o w o w o w o wo w o w w w o w h mm w m w w w m w w wN N N N r r w w m mr r r r r r r r r rN N N C " N N ? ? P " ?

r r r r. . . .

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O N O No r o rw w w *h h h hN N N N

O N O N O No r o r o rm m m m mw w w w w? ? ? N ? ?r r r r r rr r v

, . . .r r r r* . . .

r r r r. . . .

N N r Oh * r ww w w wN N N Nnz

d

r r - - r-. . . .

r r r r. . . .

r r r r. . . .

w m ~ h

9 1 1 1w w m w0 0 0 0

r r r r

w m ~ h

9 1 1 9h h W l n0 0 0 0

r r r r

o m w wr o o 0

r r r r

r w w m

1 1 1 1

W h N W r Vw w w w ww m w m~ m mr r r r r r

. . . . .+o m o m

N N N N0 0 0 0w w T ) wr r r r

m w m wm m m mw w w aN N N Nr r r r

m N m N m

~ m m mo r o r o rN N N N N N

w h w h w h m w m wr h r h r W N C O N

w w w w w w m m m m? N ? N N ? N N N Nr r r r r r r r r rr r r

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o w o w om m m m m mW M W M W Wh h h h h h

r r r r. . . .

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1 1 1 1r r r r

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. . . .

w m m w

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m m m m w rN N N r 4 W -w w w w wN N N N N N

r m r m m h m w h o~ r ~ r v mw m mm m m m m m m m m mr r r r r r N N N Nr r r r r r r r r r r r r r r r

. . . . .

w m o hw w o mN . N N Nh h W h

y r r r

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r r r r r r

w r m wo o r rh h h hN N N N

m w v t -W W W Wh h h hN N N N

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57




71/190

ASME B L - 2 83 m 2575532 003L737 b m

A N S VA S M EB1.2-1983AN AMERICAN NATIONAL STANDARD

GAGES AND GAGINGFORUNIFIED INCH SCREW THREADS

m mN m m mN m m mh l m m m~m m mN m m mN m m m~m m mN m

ocoocoo m m r

m m m mw m mn u - h h

r r r r. . . .O N O N= = T

O N O No r o rw w w wm m m m'?'?C?'?r 7 r I

O N O No r o rN N N N0 0 0 0

? ' ? ' ? Mr r r r

O N O No r o r0 0 0 0h h h h

r r r rM ? ? ?

W N O Wm m h wm m m m'?C?'?'?r r r r

h m w om m m mm m m mw w w

r r r r. . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

r m N wh W V I u -N N N Nu - u - u - u -

r r r r. . . .

r r r r. . . .

r r r r. . .

r r C r, . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

O N O Nu - u - w ww w w w

r - r r r

m m m w

C?'?'?'?

O N O Nm o m u -w h m m

0 9 9 9r r r r

r r r r

O N O NO O N NN N N N

m u - m w

9 9 9 9r r r r

O N G N

u - u - w wN N N Nm u - r m

9 9 0 9r r r r

O N O NW . W D r NwwcocoN N N N9 9 9 9r r r r

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m m h hm m m

m m m m9 6 9 9r r r r

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72/190

A S M E B 1 0 2 83 rn 2 5 7 5 5 1 2 0011720 2

GAGES AND GAGING FORUNIFIED INCH SCREWTHREADS

ANSI/ASMEB1.2-1983AN AMERICAN NATIONAL STANDAR

m mN m

m mN m

m m mr N m m mN m m m mr h l m m mN m m mm m

m mC Y ^

g so w o mo w r m

S S S P :h w m t0 0 0 0

r r r r

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r r r r r r

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o w o wO w h mo m m mm w h h2 2 2 2

sO N O No r o rm m m mm m m m' ? ? ? C ?r r r r

o r o r o rN O N O N

0 0 0 0 0 0N N N N N N"?c?C?'??c?r r r r r r

O N O No r o rw w w wm m mm m m m

O N O No r o rN N N Nm m m mY Y S Sr r r r -

O N Oo r o r0 0 0 0

q q qr r r r

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73/190

A N S VA S M EB1.2-1983AN A MERICAN NATIONAL STANDARD

GAGES AND GAGINGFORUNIFIED INCH SCREW THREA DS

m mN m

m mN m a mN m

a mN m m mN m a mN m

o m o mo m w ~o m h hS t t th W W W

r r r r

O W O Wm N N rr r o oo m r m

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m m mV ? ? ?r r r r

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. . . .

O N O No r o rr - I - 7 - rw w w wt f t f

o w o wo r o rN N N N

C?'? '?m m m

r r r r

o w o wo r o rh h R Rf t t f

o w o wo r o rN N N Nh h h hf f t T

o w o wo r o rm m m mm m m m

t p . tr r r r

o r o rw o w

C Y N N N0 0 0 0

r r r r? ? ? V

o w o wo r o r0 0 0 0

r r r r

m m m m?V V V

r r r r r r r r r r r" . .

+m q m oo o m mm m m m9 S 9 tr r r r

N N F Om m m mm m N m

V V V Vr r r r

m m b mm m m mB S Y th h w m

r r r r

micv

P --"-- O P O P0 0 0 0m m m m???Vr r r rr l - r

. . _ .

o m o mG O O 00 0 0 0

V V ?Vr r r r

m m m mw w w wm N m

r r r r? ? ? V

m o m oN m N mw w w w? ? V ?r r r r

o w o wr N W WP W P W

r r r l -

m o m -

?V V V

O N O NN m m wN N m mm m m m? S t " .r r r r r r r r

. . . .O W O Wh m m mw w w wO N NL D V ? ?r r c r

O W O W

w w w wO N N

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m h m m

L"V V V

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r O N Nw w w wo m m m

r r r r

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V V V ?t r r r r r r r

. . .-+

w r o mW P W Ww w w wr r r rS t Y t

W N m r0 0 0 0r N P m

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m w m -e w w w w. q q q q

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r r r r

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m m h rm o m mV V V V7 N N N

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m m m m

? ? ? VO O N r0 0 0 0

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74/190

ASME B 3 . 2 8 3 2 5 7 5 5 3 2 0033722 b

GAGESANDGAGING FORUNIFIED INCH SCREW THREADS

A N S VA S M E 61.2-1 983A NAMERICANNATIONALSTANDARD

c a mN m m mr i m m c aN m c aN

c a mN m

o w o wo m w wr o m mh h w wL ? ? ? ?r r r r r r r r

. . .r r r r

so w o wo r o r0 0 0 0m m m mY Y Y Yr r r r

o w o wo r o rw w w w

m m m

r r r rY ? ? ?

o w o wo r o rr r r rh h h h? ? ? L ?r c r r

o w o uo r o rh h h bo o o c

r r r rL? L- U

0 w o wo r o rN N N Nm m m m? ? L ? ?r r r r

o m w rw m m m

W W ' 4 ' 4r r r r

r r r r

iirr r r r. . . .

r r r r. . . .

? % G $0 0 0 0

W W W Wr r r r

m o m mm m h hr r r rW W W Wr r r r

w m m m0 ~ 1 m mw w w wN r r r

r r r r. . . .

m m m mo r o rh h h hm m m m

m m m m

' 4 ' 4 W ' 4\ D w w o0 0 0 0

r r r rrrT-. . .

r r r r. . . .

o m o mm m m mN N N N

T-rrrW W W W

o c o o ar ' N N N N

m m m v. - m w w u

O h O hm m m mw w w w

N N No w o wm m m mN N N Nw w w w

o w o wm m u - I mw w w w

N N No m o mm m m mw w w w

N N N

r r r r. . . .

r r r r. . . .

r r r v -. . . .

r r r r. . . .

r r r r. . . .

r r r r. . "

r r r r. .

o w o wh h O Oo o r r

r r r r

m m o r

W W W W

o w o w

Z " r 2 "m m w h o w o wO r w h

E X 2 2o w o ww w w w

m m w

W W W Wr r r r

r r r r

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o w o uw w m ow w w um m m v

* = = U

o w o wm w m w0 0 N Nh h h h' 4 ' 4 W Wr r r r

w w w wr r r r

w w w wr r r r r r r r

. "

o w o wm w o mN N m wN N N Nw w w w

o w o wN N N C Y

m m o mm m m wW W W Wr r r r

o w o wm m h hr m m

W ' 4 ' 4 Wm m m mr r r r

o w oh m m

w w wm mw m ms

r r r r. . . .

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r r r r. .

r - m r mh h r ro o r rm m m I n

w ~h m oW G w

o r-d

sU

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r r r r" . .

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w w m m

m m w wL ? ? ? ?w w w wr r r r

W r h N

w h o -m m o om m w w

w o mm w mW WN N N N

r r r ri r r r r. . . .

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r w m mw m w m0 0 0 0

W * * *m m o oh m m

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r r c r. . . .

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75/190

ASME B I - 2 83 2595532 OOLL723 8

A N S VA S M EB1.2-1983AN AMERICAN NATIONAL STANDARD

GAGES AND GAGINGFORUNIFIED INCH SCREW THREADS

m mN m m mN m m mN m m m mr N m m mN m m mN m m mN m m mN m

o w o wo w w wo m m mo m w m? ? L ? ?r r r r

0 6 0 9o w m c ro m m uw m m c rZ

o w o wo w ww m om m m mWr r r r

O W 0 6O w h mW W N N

m m mw w w wr r r r

o w o w

h h w w

r r r r

o a w wa h m mw w w ?

o w o u. o o o c

r o rC N N N h

" W W Ur r r r

o w o uo r o rh h h hN N N h? w wv r r r

o w o wo r o r0 0 0 0h h h h? L ? ? ?r r r r

o w o wo r o rm m m mr r r rw w w w

~

o w o wo r o r0 0 0 0w w w w$ $ $ $

0W

r r r r. . . .

w w r hm m N r. - w w w um m m l r

m o a mN N m mm m w ww w w w

mm

o w m mm h w mm m m mr r r r

W

m m h m

w w w ?r o m mw w m mr r r r

m m r rm h m0 0 0 0h h h h

r r r r. . . ,

r r r r. . . .

r r r r. . . *

h o m wN N O mm m m Nh h h hr r r rr r y

. . . .7 r - r. . . .

; 5 % 5 3m m m m

. w w w qr r r r

a m w mm m a mw w w w

w w wc r r r

0 0 3 0 0 c- w r w r u

N N N N N n

.priim o m 0w w a ww h aw w w wr r r r

O h O h0 0 0 0m v I m my r r rh h h h .

o w o w0 0 0 0m m m mr r r rh h h h

o w o w0 0 0 0m m m mr r r rh h k h

o w o w o a

h h h h h ho o o o o cm m m m m ur r r r r r

o w o w

N N m mh h h h

m w a mm m r ro w o wh w o rN N m mh h h hm m m m

o w o w

m m m mr r r r

a m w hw w m wh h h h

o w o wO r wm m o om m w wh h h hr r r r

o w o wm o w mh h h hh a m mr q r q r q r q

o w o w o um w w m m uw w w w m mrrNNNN

r r r r r rh h h h h hiiii

r r r r. . . .

r r r r. . . .

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V l r - 6 0

; N N N ~W h m O

. - w w w wr r r r

w m w rN m m wm m m mw w w wr r r r

m w w rh W 0 rm m w 6w w w wr r r r

m w o hr m w wm m m mw w w w

r h w oo o m wh h h hw w w wr r r r

w w m rC r m m om m m wm m or r r r. . . .

r r r t -. . . .

r r r r. . .

o m r wm m w wr r r r

m m m mw w w w

N N m m0 0 0 0h h h h

m m w a

r r r r. . . .

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a m m am m m m- r m mw w w w

a m m a

w w w wm m h wN N N N

Z-rrr

0 0 - rh r m h

w w w wa al-r-I-r

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w w w ww w wr r r r

r h m mm m m mm m mw w w w

m r o wm m m m

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62




76/190

A S M E B I - 2 83 W 2 5 7 5 5 3 2 003372'i T W

GAGES AN D ,GAGINGFORUNIFIED INCHSCREW THREADS

ANSI/ASME B1.2-1983ANAMERICANNATIONALSTANDARD

m mN m m mN mm mN m a mN m

m mN mm mN m

m mN mmN m

o w o wo m m rO m N Nw m m mh h h hr r r r

o w o wo m w wh W W W

r r r r

O ~ N O

h h h h

o wm No o mo m w

Cqc9hhiiio w o wo r o ro o c od d w wh h h h

o w oo r om t nw o o mh h h hr r v r

o w o wo r o rm m m mr r r r

m m w w

h h h h

o w o wo r o rm m m mm m m m

F ?. . "

r r r r.

N ~ N W

h h h hw m w mw w w w

r r r r

m m h mw m w wh h h hw m w w

r r r rr r r. . . .

r r r r. . . .

.- E2 2

m m w mh w w mm m m mh h h h

N r O mh m h

o o o mr r r rc9c9c9h

o m d m

c 9 c 9 c 9 c 9w h w m0 0 0 0

r r r rr r - r. . . .

r r r r. . . .

r r - r r. . . .

y

N h N h

0 0 0 0h h h h

m m m m

h h h hr r r rm m m mr r r - r

m m m mr N r Nh h h hh h h h

o w o w0 0 0 0w m m c oh h h hr r r r

m m

c 9 c 9

o r oN P I

r r r rr r r r. . . . r r r r. . . .

m r m rN m N mr r r rm m w m

7 - r r. . . .

r r r r. . . .

o w o wN m m wm m h hm m m mh h h hr r r r

o w o wm w r Nm m r rm m o oh h m w

o w o wm w r wr r m m0 0 0 0

m m m w

o w o wN m w w0 0 0 0

m o w m

c 9 c 9 c 9 c 9r r r r

o w o ww w w wm m m mm w w m

m w w m

o w o wh W 0 Yh h O Qm m w w

r r r rc 9 Q ? c 9 c 9

r r t - r. . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

O d O W

N N m wh h h h

m m o m

W C O E O Ws . + + W +r r r r

+ + + +r r r r r r r r

. . . .

N m m w* w r

w w w wh h h hr r r r

h w o hw h r rm m w wh h h h

r r r r. . . .

r r r r. . . .

r r r r. .

m m m wm m h wm m m mw w w w

w o m m

h h h ho r m wm m m mr r r r

o w m mw w w wr r r r

m m h mh h h h

w m d mm w o om m w wk k h h

w m r wm d m ww m m mh h h h

r r r r. . . . iiii r r r

m m m m~ m m m mm m m. wwwq

r r r r

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h N N hr r w m0 0 0 0h h h h

m m m m

h h h ho m r rh W h h

r r r r

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r r r rh h h h

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w w m m

h h h hr r r r. . . .

$U- $ 2 $ 2

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63




77/190

ASME 93.2 8 3 m 2 5 7 5 5 3 2 0033725 I

A N S VA S M E81.2-1 983AN A MERICAN NATIONAL STANDARD

GAGES AND GA GINGFORUNIFIED INCH SCREW THREADS

Y)-U-

p s

m mw m m mN M m m~m m mr a m m m mr ~m m~m m m~m

O W h U lO d O dN r w wm m w mw m w a

8 $ 8 2d m c 1 3 aw w w aW h h. . . .

r r r r. . . .

r r r r

o w o wo r o rr r r rN N N Nc s c 9 c q c 9r r r -

O W O r Do r o rh h h hl n m m m

r r r rh h h h

O W O I Do r o rN N N C U0 0 0 0

r r r rc S c 9 Q ? a

o r o rw o u

o o o ch h h h

r r r rc q c q c q c o

o w o wo r o rw w w ww w w wm m m m o r o r o r

w o w o w

m m m m m m

r r r r r r

m m m m m mh h h h h h. . .

r r r r

~ m ~ mm m w wo m c ow w w c o

C t O W dr r m mr r o om m m m

W W h WW d N m" * Ww w w m

w o r n m mw m mw w w wwcocow. . .r r r r

. . . .r r r r

. . . .r r r r

. . . .r r r r

. . . .r r r r

m h h mh l r m wr r o om m m m

r w m oMNrrm m m m4 4 4 4r r r r

. . . .r r r r

N h N h

N N N Nw w w wm m m m w w w wm m m m

w c o w w

m w m w * W d W

w w w ww w wm m m

. . . .r r r r

. . . .r r r r G 4 4 4

h W h Wm m m m

m m m mm m m m h W h W

m r m rm m m mc n m m c n

o w o c o o w0 0 0 0 0 00 0 0 0 0 00 0 0 0 0 0

t . i r 4 t . i r i t . i t . i

o m o mm m m mh h h hw w m w. . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

r r r r. . . .

r r r r

o w o wO O N NN N N N

r r r r

w m m w

4 4 4 4

o w c wm w r mw w w wN N N N

r r r r4 4 4 4

o w o wb m o om m w hw w w wa, W. W. W.

r r r - r

o w h mN N W hw m w c or r r rh h h h

* o * ow h m oh k h W. . . .

r r r C

~ w m mw w w mM M M ~

c 9 c 4 c 9 c 9r r r r

m w m o

w q w w

w w o r" t m mm m m mm o ~ mw m m mc9c9mc9r r r r

W O M hw m r r

w w m mm o o

m o m w w rw m m m w mm m c y " r - tw w w w w wr r r r . . . .r r r r . . . .r r r r . . . . . .r r r r r r

m w m m

W c q c q o ?m w o orrNN

r r r r

m m m km d h ww w s q w

N W c o Nw h m mw w w wr r r rW W c q c q

r r m mm m wc o w w ww w w w. . . .r r r r

O W m rT O N NW d d dw w w w

W Y N hw w m c oN N N Nw m w w

m r o w0 0 0 0

r r r r

m m m w4 4 4 ?

o m m wd m w mm m m mw w w w. . .r r r r

. . . .r r r r

. . . .r y - 7

. . . .r r r r

m-U s s $ 2

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78/190

GAGES AND 'GAGINGFORUNIFIED INCH SCREW THREADS

A N S I I A S M EB1.2 -1983A NAMERICANNATIONALSTANDARD

m m~m

m mr i m m mN m m mm m m mN m m mr i m m mN m mr im m~m

0 - 0 -

NNrr

o m c o wm h m m4 4 9 9r r r r

O V O Ww m o oW W W W

o m m w

T 4 9 4r r r r 7 r v . r

. . . .

o w o wo r o r0 0 0 0r r r r

r r r r4 9 9 9

o w o wo r o rN N N Nm m m m9 9 4 9r r r r

o w o wo r o rw w w wW W W WT 4 9 9F r - r r

o w a wo r o r

m m m mm m m mW W V V

o w o wo r o r0 0 0 0

m m m m? T ? ?r r r r

0.9 wo r o rm m m mm m m m9 9 9 9N N N r ir r r

. . . .---C -

o m r wN N N N0 0 0 0

m h m - t

r r r r. . . .

C r r r. . . _

r r r r. . . .

m m m mw m w m9 9 9 97 r r r

r r r r

h N h NW h W hr r r r

N N N N9 9 9 9

m m m m7 8 3 : :0 0 0 0

m m m mo r o rh h h h0 0 0 0

r i r i r i r i

o m o m; o o o o. - o o o o

0 0 0 0

N N N N

O h O h0 0 0 00 0 0 0y , S z o w o w

0 0 0 00 0 0 0z z z z o w o w

0 0 0 00 0 0 0z z z z

0 0 0 0o m o m0 0 0 0

N N N N9 9 9 9

o w o wL - i N m V )m o rm m m m9 4 9 9r r r r

o w o wm m w hw w m mm m m m4 = : 9 9r r r r

o w o wO r w hm m o om m m m9 9 9 9r7 t - r

o w o wO O F N~ m m om m m m9 9 9 9r r r r

o w o w~ m m mW W W W0 0 0 0

T T T TN N N N

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O W O Ww ~ o mN N m WN N N Nr. T. T. TN N N N+

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m r r m

m m m mm o W WW h h h

O W W Om m a mV V W V

N N N N9 9 9 9

r r r r. . . .

r r r r. . . .

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h N O m

o o r rm m m

q 9 9 9m m w wW W O Ow w w w0 0 0 0

m o m -m ~ h m~ m m m0 0 0 0

e i r e i r r e

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r r r r

h r m hm m m m9 9 9 9O O N r

r r r r r r r r. . . . r i r i

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F r - F Y. . . .

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79/190

A N S VA S M EB1.2-1983AN A MERICAN NATIONAL STANDARD

GAGES AND GAGINGFORUNIFIED INCHSCREW THREADS

m m mr w m

m m~m

m m~m

m mN mm mN m

VI

R-V

m mN m

O d O do m h m

0 0 0 0ez?si?i?

N N N N

0 d O * do m m wm h m mh h W WC: T. 7. rN N N N

O d O d

w m o om m w

m m m m7 7 7 7N N N N

O d O VO Q h U I0 0 0 0h w m m

O d O d

o m m md M N No m h m

o w o wo r o r

0 0 0e K K K K

N N N N

o w o w o wo r o r o r0 0 0 0 0 0m m m m m mY= Y= zzs

o w o wo r o r0 0 0 0

h h h hz=?zzo w o wo r o rm m m mr r r r

N N N Nr r r r

o w o wo r o r0 0 0 0w w w wx-.xx

o w o wo - o rN N N N

r l - r rm m m m

o w o wo r o rw w w wm m m mr . r r rN N N N

o w o wo r o rm m mm m mT. l-. C;N N N N

mmm m m mm M N r

nz

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51

50

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49 50 50 50 50 50 50 51 51 51 51 51 51 51 51 51 51 52 51 52 52 52 52 52 52

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IGHT merican Society of Mechanical Engineers


IGHT American Society of Mechanical Engineers



136/190

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52

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52

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Dam 1 in

52

52

52

52

52

52

52

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53

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53

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53

53

53

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Min

Dam 1 in

51

51

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52

52

52

52

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Dam 1 In

52

52

52

52

52

52

52

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53

53

53

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53

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54

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Min

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51

51

51

51

52

52

52

52

53

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53

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54

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4 in52

52

52

52

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54

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5 in52

52

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52

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137/190

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56

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56

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56

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56

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56

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57

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57

57

57

56

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57

57

56

57

57

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-

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54

54

54

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55

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54

54

54

54

55

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55

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55

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55

55

55

55

55

55

56

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1

54

54

54

54

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55

55

55

55

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54

54

54

54

55

55

55

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55

55

55

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55

55

55

56

56

55

55

56

56

56

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Dam Ca 1

1

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54

3

54

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2

54

54

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55

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55

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55

2

55

55

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55

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55

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55

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138/190

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5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

Pch

Dam 1 in

5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

Pch

Dam 9 in

5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

Min

Dam 1 in

5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 ch

Dam 1 in

5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

Min

Dam

Ca

1

1

5

28

in5 5

38

5 5

2 5 5

3

5 5

2

5 5

38

5 5

2 5 5

38

5 5

28

5 5

3

5 5

28

5 5

3 5

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ed

4 in5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

F

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5 in5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6

Tu

ed

7 in

5 5 5 5 5

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5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

F

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2

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5

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5

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139/190

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ansiasme b1.2-1983 (revision of ansi b1.2-1974).pdf

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