UDC 621’66 : 006’67 ( Sixth Reprint JANUARY 1997 ) IS : 1367 ( Part I ) - 1960

Indian Standard

TECHNICAL SUPPLY CONDITIONS FOR THREADED STEEL FASTENERS

PART I INTRODUCTION AND GENERAL INFORMATION

( Second Revision )

1. Scope- Covers the tectrnical conditions of delivery of bolts, screws, studs, nuts and similar threaded and formed parts unless special requirements are laid down in the relevant product standards. The standard may also be applied to non-standard products for which standards are yet to be formulated.

Note-The products under the purview of the standard shall have threads to IS : 4218 ( Part I )-1976 to IS : 4218 ( Part VI )-1976 ’ IS0 metric screw threads ( first revision ) ‘.

1.1 This part is intended to serve as an introduction to the remaining which cover the specific requirements of fasteners like product grades, mechanical properties, methods of test, etc. The different parts are as under:

Part I Introduction and general information

Part II Product grades and tolerances

Part Ill Mechanical properties and test methods for bolts, screws and studs with full loadability

*Part IV Mechanical properties and test methods for bolts, screws and studs with reduced loadability

Part V Mechanical properties and test methods for set screws not under tensile stresses

Part VI Mechanical properties and test methods for nuts with specified proof loads

Part VII Mechanical properties and test methods for nuts without specified proof loads

Part VIII Mechanical properties and test methods for prevailing torque type lock nuts

Part IX Surface discontinuities on bolts, screws and studs

Part X Surface discontinuities on nuts

Part Xl Electroplated coatings on threaded fasteners

Part XII Phosphate coatings on threaded fasteners

Part XIII Hot dip galvanized coatings on threaded fasteners

Part XIV Stainless steel threaded fasteners

Part XV Requirements at subzero and elevated temperatures

Part XVI Designation system and symbols

*Part XVII Acceptance criteria

Part XVIII Marking and mode uf delivery

Part XIX Axial load fatigue testing of bolts, screws and studs

2. General Requirements

2.1 NO specific manufacturing method need be adhered to as long as the products exhibit the strength characteristics and conform to the relevant product grades along with the dimensional requirements as stipulated in the product standards.

2.2 No specific appearance of the products is specified.

Note-Fasteners are normally supplied in either dull back condition or finished bright on all surfaces. Fastenerr that have been heat treated are dull back

2.3 Unless otherwise specified, the products shall be supplied in a well-cleaned condition and suitably protected against corrosion with a thin film of oil.

*Formulation of these parts will await corresponding international agreement.

Adopted 22 April 1989 0 June 1980, ISI Or 2

BUREAU OF INDIAN STANDARDS MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

IS : 1367 ( Part I ) - 1980

2.4 Unless otherwise specified, centre holes in both, screws and studs in all grades may be allowed to remain.

3. Workmanship

3.1 Fasteners shall be cleanly finished, sound and free from defects which may affect their serviceability, consistent with the method of manufacture.

3.2 Fasteners shall have full surfaces and edges in keeping with the method of manufacture. They shall be free from burrs, although barely perceptible thin burrs which result, for example, from slotting and trimming operations, may be left out.

3.3 Grade C bolts may have reasonable die seam on the shank, but in no case the shank diameter with such seams shall exceed the maximum permissible diameter.

EXPLANATORY NOTE

This standard was first published in 1961 and subsequently revised in 1967. As a result of international agreements arising from the work of ISO/JC 2, the IS0 committee on fasteners, extensive alterations have come about, which have necessitated a thorough revision with substantial additions to the 1967 edition. For technical and drafting reasons alike, the standard has been split into various parts, as already spelt out in the standard.

While specific requirements of fasteners are covered in the rest of the parts, this part is intended to provide an introduction to the different parts of the standard and cover requirements which are general in nature.

The concept of full and reduced loadability of externally threaded fasteners has been introduced in the present revision although international agreements are yet to be reached on screws with reduced loadability. Accordingly products with different geometry and head configuration would no longer be called to exhibit uniform loadability or strength characteristics. Similarly se! screws ( grub screws ) are classified as a separate category since these type of screws are not under tensile stresses. Thus the strength characteristic for set screws would shift from tensile strength to hardness values.

Similar to the externally threaded fasteners, distinctions have been made in the strength characteristics of nuts depending on whether they are hexagon nuts with standard thread heights, thin nuts, nuts of special geometry, etc.

One of the important additions in the present revision has been the limits of surface discontinuities on bolts and nuts. The new requirements on surface flaws which quantify the defects with allowable limits also include sampling plans for acceptance programmes. The revision also includes requirements of electroplated coatings and chemical conversion coatings like phosphating on threaded fasteners.

A list of related standards which cover the various parameters like nominal lengths, thread length, thread run-out and undercuts, thread ends, dimensions for radii under the head, etc, is given in Appendix A. The list also includes standards on raw materials and methods of test on fasteners.

2

IS: 1367(Partl)-1980 \’ :I

APPENDIX A

LIST OF RELATED STANDARDS

(The list does not include dimensional standards on fasteners )

IS : 226-1975 Structural steel (standard quality) ( fifth revision)

IS : 919-1963 Recommendations for limits and fits for engineering (revised)

IS : 1368-1967 Dimensions of ends of bolts and screws ( firsf revision)

IS : 1369-1975 Dimensions of screw thread run-outs and undercuts ( firsf revision )

IS : 1499-1959 Method for Charpy impact test ( U-notch ) for steel

IS : 1500-1968 Method for Brine11 hardness test for steel ( tksf revision )

IS : 1501-1968 Method for Vickers hardness test for steel ( firsf revision )

IS : 1570-1961 Schedules for wrought steels for general engineering purposes

IS : 1570 Schedules for wrought steels:

( Part I ) - 1978 Steels specified by tensile and/or yield properties ( first revision )

( Part II ) - 1979 Carbon steels ( unalloyed steels ) ( firsf revision )

( Part IV) - 1979 Carbon and carbon-manganese free cutting steels ( firsf revision )

( Part V ) - 1972 Stainless and heat-resisting steels ( first revision )

IS : 1586-1968

IS : 1608-1972

IS : 1821-1967

IS : 2253-1969

IS : 2334-1975

IS : 2591-1969

IS : 2614-1969

IS : 4172-1967

IS : 4206-1967

IS : 4218-1976

IS : 8535-1977

IS : 8536-1977

IS : 8537-1977

IS :

IS :

Methods for Rockwell hardness test ( B and C scales ) for steel (first revision )

Methods for tensile testing of steel products ( f7rst revision )

Dimensions for clearance holes for metric bolts (first revision )

Mild steel wire rod for the manufacture of machine screws ( by cold heading process ) ( first revision )

Gauging practice for IS0 metric screw threads ( first revision )

Hot rolled bars for threaded components ( firsf revision )

Methods for sampling of fasteners (first revision )

Dimensions for radii under the head of bolts and screws

Dimensions for nominal lengths and thread lengths for bolts, screws and studs

IS0 metric screw threads ( firsf revision )

Terminology for features of fasteners

Dimensioning of fasteners

Nomenclature and terminology of fasteners

Dimensions for width across flats for hexagon bolts and nuts (under preparation )

Dimensions for split pin holes, wire holes and head slots for bolts ( under preparafion )

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