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December 2006

IS 6094 (Part 2): 2006ISO 4027:2003

Indian StandardHEXAGON SOCKET SET SCREWS

PART 2 WITH CONE POINT( Third Revision)

ICS 21.060.10

@ BIS 2006BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002Price Group 3

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IS 6094 (Part 2) :2006ISO 4027:2003

Bolts, Nuts and Fasteners Accessories Sectional Committee, PG/BP 33

NATIONAL FOREWORDThis Indian Standard (Part 2) (Third Revision) which is identical with ISO 4027:2003 Hexagon socketset screws with cone point issued by the International Organization for Standardization (ISO) wasadopted by the Bureau of Indian Standards on the recommendation of the Bolts, Nuts and FastenersAccessories Sectional Committee and approval of the Medical Instruments, General and ProdEngineering Division Council.The original version of this standard was issued in 1963 subsequently revised in 1971 and 198second revision was based on the following ISO Standards:

ISO 4026:1983 Hexagon socket set screws with flat pointISO 4027:1983 Hexagon socket set screws with cone pointISO 4028:1983 Hexagon socket set screws with dog pointISO 4029:1983 Hexagon socket set screws with cup point

Iction

. The

This third revision has been revised by splitting it into four parts harmonizing with ISO 4026:2003,ISO 4027 :2003, ISO 4028:2003 and ISO 4029:2003 respectively by adopting them under dualnumber.This Part 2 has been harmonized with ISO 4027:2003 by adoption to make pace with the latestdevelopments taken place at international level.The other three parts of this standard are:

Part 1 With flat point (third revision)Part 3 With dog point (third revision)Part 4 With cup point (third revision)

The text of ISO Standard has been approved as suitable for publication as an Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attentionis particularly drawn to the following:

a) Wherever the words International Standard appear referring to this standard, they shouldbe read as Indian Standard.b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practiceis to use a point (.) as the decimal marker.

In this adopted standard, reference appears to certain International Standards for which Indian Standardsalso exist. The corresponding Indian Standards which are to be substituted in their places are listedbelow along with their degree of equivalence for the editions indicated:

/nternafiona/ Standard Corresponding Indian Standard Degree ofEquivalence

ISO 225 : 1983 Fasteners IS 8536:1987 Fasteners Bolts, screws, IdenticalBolts, screws, studs and nuts studs and nuts Symbols and designationSymbols and designations of of dimensions (first revision)dimensionsISO 261:1998 ISO general IS 4218 (Part 2) : 2001 ISO general dopurpose metric screw purpose metric screw threads: .Part 2threads GeneraI plan General plan (second revision)

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international Standard

!S0 898-5 : 1998 Mechanicalproperties of fasteners made ofcarbon steel and alloy steel Part 5 : Set screws and similarthreaded fasteners not undertensile stressesISO 965-2 : 1998 ISO generalpurpose metric screw threads Tolerances Part 2 : Limits ofsizes for general purpose externaland internal screw threads Medium qualityISO 965-3 : 1998 ISO generalpurpose metric screw threads Tolerances Part 3: Deviationsfor constructional screw threadsISO 3269 : 2000 Fasteners Acceptance inspection

do

Corresponding Indian Standard Degree ofEquivalence

IS 1367 ( Part 5 ) :2002 Technical supply Identicalconditions for threaded steel fasteners:Part 5 Mechanical properties of fastenersmade of carbon steel and alloy steel Setscrews and similar fasteners not undertensile stresses (fhird revision)IS 14962 (Part 2) :2001 !S0 generalpurpose metric screw threads Tolerances: Part 2 Limits of sizes forgeneral purpose external and internalscrew threads Medium quality

doIS 14962 (Part 3) :2001 ISO generalpurpose metric screw threads Tolerances: Part 3 Deviations forconstructional screw threads doIS 1367 (Part 17) :2004 Technical supplyconditions for threaded steel fasteners:Part 17 Inspection, sampling andacceptance procedure (fourth revision) doIS 1367 (Part 14/See 3) :2002 Technicalsupply conditions for threaded steelfasteners: Part 14 Mechanical properties ofcorrosion-resistant stainless-steelfasteners, Section 3 Setscrews and similarfasteners not under tensile stress (thirdrevision)IS 1367 (Part 11) :2002 Technical supplyconditions for threaded steel fasteners:Part 11 Electroplated coatings (thirdrevision)IS 1367 (Part 2) :2002 Technical supplyconditions for threaded steel fasteners:Part 2 Tolerances ,for fasteners Bolts,screws, studs and nuts Product gradesA, B and C (third revision)IS 1367 (Part 9/See 1) :1993 Technicalsupply conditions for threaded steelfasteners: Part 9 Surface discontinuities,Section 1 Bolts, screws and studs forgeneral applications (third revision)IS 1367 (Part 1) :2002 Technical supplyconditions for threaded steel fasteners:

ISO 3506-3 : 1997 Mechanicalproperties of corrosion-resistantstainless-steel fasteners Part 3: Set screws and similar fastenersnot under tensile stress

doISO 4042 : 1999 Fasteners Electroplated coatings

doISO 4759-1 :2000 Tolerances forfasteners Part 1 : Bolts,screws, studs and nuts Productgrades A, B and C

ISO 6157-1 :1988 Fasteners Surface discontinuities Part 1:Bolts, screws and studs forgeneral requirements

1S0 8992 : 1986 Fasteners General requirements for bolts,screws, studs and nuts Part 1 General requirements forscrews and studs (third revision)

bolts,

do

do

ii

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The technical committee has reviewed the provisions of the following International Standards referred inthis adopted standard and has decided that they are acceptable for use in conjunction with this standard:hternational Standard TitleISO 8839:1986 Mechanical properties of fasteners Bolts, screws, studs and nuts

made of non-ferrous metalsISO 10683:2000 Fasteners Non-electrolytically applied zinc flake coatingsISO 23429:2004 Gauging of hexagon sockets

As decided by the Committee additional requirements of Packaging and BIS Certification Marking aregiven in National Annex A. These additional requirements are part of this standard.For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordancewith IS 2 : 1960 Rules for rounding off numerical values (revised). The number of significant placesretained in the rounded off value should be the same as that of the specified value in this standard.

...Ill

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IS 6094( Part2) :2006ISO 4027:2003

lndian StandardHEXAGON SOCKET SET SCREWS

PART 2 WITH CONE POINT( Third Revision)

1 ScopeThis International Standard specifies the characteristics of hexagon socket set screws with cone point andthreads from Ml,6 up to and including M24 and of product grade A.If, in special cases, specifications other than those listed in this International Standard are required, they shouldbe selected from existing International Standards, e.g. ISO 261, ISO 898-5, ISO 965-2, ISO 3506-3 and1s04759-1.

2 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and designations of dimensionsISO 261, ISO general-purpose metric screw threads General planISO 898-5, Mechanical properties of fasteners made of carbon steel and alloy steel Part 5: Set screws andsimilar threaded fasteners not under tensile stressesISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for generalpurpose external and internal screw threads Medium qualityISO 965-3, ISO general purpose metric screw threads Tolerances Part 3: Deviations for constructionalscrew threads

ISO 3269, Fasteners Acceptance inspectionISO 3506-3, Mechanical properties of corrosion-resistant stainless-steel fasteners Part 3: Set screws andsimilar fasteners not under tensile stressISO 4042, Fasteners Electroplated coatingsISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, Band CISO 6157-1, Fasteners Surface discontinuities Part 1: Bolts, screws and studs for general requirementsISO 8839, Mechanical properties of fasteners Bolts, screws, studs and nuts made of non-ferrous metalsISO 8992, Fasteners General requirements for bolts, screws, studs and nutsISO 10683, Fasteners Non-electrolytically applied zinc flake coatingsISO 23429, Gauging of hexagon sockets

1

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3 DimensionsSee Figure 1 and Table 1.Symbols and designations of dimensions are specified in ISO 225.

1

Permissible alternative form of socket

For broached sockets which are at the maximum limitof size, the overcut resulting from drilling shall notexceed 1/3 of the length of any flat of the socket whichis e12.

Wd s I_e/2

(e/2)/31

l_._. +._._l

a The 120 angle is a requirement for short-length screws of nominal length 1,s ituated in the shaded areas in Table 1.b The angle T applies only to the portion of the point situated below the root diameter of the thread, and shall be 120 fornominal lengths situated in the shaded areas in Table 1 and 90 for all other lengths.c Incomplete thread u < 2P.d A slight rounding or countersink at the mouth of the socket is permissible.

Figure 1

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IS 6094( Part2) :2006ISO 4027:2003

Table 1 DimensionsDimensions in millimetres

Thread (d) M1,6 M2 M2,5 M3 M4 M5 M6 M8 M1O M12 M16 M20 M24P 0,35 0,4 0,45 0,5 0,7 0,8 1 1,25 1,5 1,75 2 2,5 3d max. 0,4 0,5 0,65 0,75 1 Y,25 1,5 2 2,5 3 4 5 6dl % Minor thread diameter~b, C min. 0,809 1,011 1,454 1,733 2,303 2,873 3,443 4,583 5,723 6,863 9,149 11,429 13,716

nom. 0,7 0,9 1,3 1,5 2 2,5 3 4 5 6 8 10 12s max. 0,724 0,913 1,300 1,58 2,08 2,58 3,08 4,095 5,14 6,14 8,175 10,175 12,212

min. 0,710 0,887 1,275 1,52 2,02 2,52 3,02 4,020 5,02 6,02 8,025 10,025 12,032d 0,7 0,8 1,2 1,2 1,5 2 2 3 4 4,8 6,4 8 10t min. e 1,5 1,7 2 2 2,5 3 3,5 5 6 8 10 12 15

NOTE CommercialIerwthsare those betweenthe bold stepped lines.a F is the pitchof the thread.b em,n= l,14S~in.c Combined gauging of socket dimensions e ands, see ISO 23429.d For screws with nominal lengths in the shadedareas.e For screws with nominal lengths below the shaded areas. .

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4 Requirements andSee Table 2,

reference International Standards

Table 2 Specifications and reference International Standards!aterialieneral requirements InternationalStandard

Tolerancebread International StandardsProperty classflechanical propertiesInternational StandardsProduct gradeolerances International Standard

inish

Wface discontinuities

Lcceptability

Steel Stainless steel Non-ferrousmetalISO 89926g

ISO 261. ISO 965-2, ISO 965-3A1-12H, A2-21H,45H A3-21H, A4-21H, As agreedA5-21 H1 1ISO 896-5 ISO 3506-3 ISO 8839

A

As processedRequirements forelectroplating arecovered inISO 4042.Requirements fornon-electrolyticallyapplied zinc flakecoatings arecovered inISO 10683.Limits for surfacediscontinuities arecovered inISO 6157-1.

1s0 4759-1Plain Plain

Requirements forelectroplating arecovered in ISO 4042.

For acceptance procedure, see ISO 3269.

5 DesignationEXAMPLE A hexagon socket setscrew withcone point,thread M6, nominal length 1 = 12 mm and of propertyclass 45H,is designated as follows:

Hexagon socket set screw ISO 4027- M6x 12- 45H

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NATIONAL ANNEX A( National Foreword)

A-1 PACKAGINGThe packaging of hexagon head bolts shall be in accordance with IS 1367 (Part 18) : 1996Industrial fasteners Threaded steel fasteners Technical supply conditions: Part 18 Packaging(third revision).A-2 BIS CERTIFICATION MARKINGDetails available with the Bureau of Indian Standards.

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Bureau of Indian StandardsBIS is a statutory institution established under the Bureau of /ndian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification ofgoods and attending to connected matters in the country.CopyrightBIS has the copyright of all its publications. No part of these publications may be reproduced in anyform without the prior permission in writing of BIS. This does not preclude the free use, in the courseof implementing the standard, of necessary details, such as symbols and sizes, type or gradedesignations. Enquiries relating to copyright be addressed to the Director (Publications), BIS.Review of Indian StandardsAmendments are issued to standards as the need arises on the basis of comments. Standards arealso reviewed periodically; a standard along with amendments is reaffirmed when such review indicatesthat no changes are needed; if the review indicates that changes are needed, it is taken up for revision.Users of Indian Standards should ascertain that they are in possession of the latest amendments oredition by referring to the latest issue of BIS Catalogue and Standards: Monthly Additions.This Indian Standard has been developed from Dot: No. PG/BP 33 (0492).

Amendments Issued Since PublicationAmend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDSHeadquarters:Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones 23230131,23233375,2323 9402 website: www.bis.org.inRegional Offices: TelephonesCentral :

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Printed at Simco Printing Press,Delhi