1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 14579:2011Hexalobular socket head capscrews (ISO 14579:2011)BS EN ISO 14579:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN I
2、SO14579:2011. It supersedes BS EN ISO 14579:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9/3, Fasteners - Product Standards.A list of organizations represented on this committee can beobtained on request to its secretary.This publication doe
3、s not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 71157 2ICS 21.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of
4、theStandards Policy and Strategy Committee on 30 April 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14579 March 2011 ICS 21.060.10 Supersedes EN ISO 14579:2001English Version Hexalobular socket head cap screws (ISO 14579:2011) Vis
5、 mtaux tte cylindrique six lobes internes (ISO 14579:2011) Zylinderschrauben mit Innensechsrund (ISO 14579:2011)This European Standard was approved by CEN on 31 January 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Euro
6、pean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official version
7、s (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Be
8、lgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN CO
9、MMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14579:2011: EBS EN ISO 14579:20
10、11EN ISO 14579:2011 (E) 3 Foreword This document (EN ISO 14579:2011) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN. This European Standard shall be given the status of a national
11、standard, either by publication of an identical text or by endorsement, at the latest by September 2011, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of paten
12、t rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 14579:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europea
13、n Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the
14、United Kingdom. Endorsement notice The text of ISO 14579:2011 has been approved by CEN as a EN ISO 14579:2011 without any modification. BS EN ISO 14579:2011ISO 14579:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of
15、 national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Int
16、ernational organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with t
17、he rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval
18、by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14579 was prepared by Technical Committee I
19、SO/TC 2, Fasteners, Subcommittee SC 10, Product standards for fasteners. This second edition cancels and replaces the first edition (ISO 14579:2001), of which it constitutes a minor revision. BS EN ISO 14579:2011BS EN ISO 14579:2011INTERNATIONAL STANDARD ISO 14579:2011(E) ISO 2011 All rights reserve
20、d 1Hexalobular socket head cap screws 1 Scope This International Standard specifies the characteristics of hexalobular socket head cap screws, with thread sizes from M2 up to and including M20, of product grade A. If, in special cases, specifications other than those listed in this International Sta
21、ndard are required, they can be selected from existing International Standards, for example ISO 261, ISO 888, ISO 898-1, ISO 965-2, ISO 965-3, ISO 3506-1 and ISO 4759-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refere
22、nces, 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 descriptions of dimensions ISO 261, ISO general-purpose metric screw threads General plan ISO 8
23、98-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and in
24、ternal screw threads Medium quality ISO 965-3, ISO general purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threads ISO 3269, Fasteners Acceptance inspection ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws an
25、d studs ISO 4042, Fasteners Electroplated coatings ISO 4753, Fasteners Ends of parts with external ISO metric thread ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 6157-1, Fasteners Surface discontinuities Part 1: Bolts, screws and studs for
26、general requirements ISO 6157-3, Fasteners Surface discontinuities Part 3: Bolts, screws and studs for special requirements ISO 8839, Mechanical properties of fasteners Bolts, screws, studs and nuts made of non-ferrous metals ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts
27、 ISO 10664, Hexalobular internal driving feature for bolts and screws ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings BS EN ISO 14579:2011ISO 14579:2011(E) 2 ISO 2011 All rights reserved3 Dimensions See Figure 1 and Table 1. Symbols and descriptions of dimensions are specified
28、in ISO 225. Dimensions in millimetres Maximum underhead fillet, lf,max= 1,7 rmaxa,max s,maxmax2ddr= For rmin, see Table 1. adsapplies if values of ls,minare specified. bThe point shall be chamfered or, for threads u M4, may be as-rolled, in accordance with ISO 4753. cIncomplete thread u u 2P. dTop e
29、dge of head may be rounded or chamfered, as shown, at the discretion of the manufacturer. eBottom edge of head may be rounded or chamfered to dwbut, in every case, shall be free of burrs. fReference datum for dw. Figure 1 BS EN ISO 14579:2011ISO 14579:2011(E) ISO 2011 All rights reserved 3Table 1 Di
30、mensions Dimensions in millimetres Thread, d M2 M2,5 M3 M4 M5 M6 M8 Pa0,4 0,45 0,5 0,7 0,8 1 1,25 bbref. 16 17 18 20 22 24 28 max.c3,80 4,50 5,50 7,00 8,50 10,00 13,00 max.d3,98 4,68 5,68 7,22 8,72 10,22 13,27 dkmin. 3,62 4,32 5,32 6,78 8,28 9,78 12,73 damax. 2,6 3,1 3,6 4,7 5,7 6,8 9,2 max. 2,00 2,
31、50 3,00 4,00 5,00 6,00 8,00 dsmin. 1,86 2,36 2,86 3,82 4,82 5,82 7,78 lfmax. 0,51 0,51 0,51 0,6 0,6 0,68 1,02 max. 2,00 2,50 3,00 4,00 5,00 6,0 8,00 k min. 1,86 2,36 2,86 3,82 4,82 5,7 7,64 r min. 0,1 0,1 0,1 0,2 0,2 0,25 0,4 v max. 0,2 0,25 0,3 0,4 0,5 0,6 0,8 dwmin. 3,48 4,18 5,07 6,53 8,03 9,38 1
32、2,33 w min. 0,55 0,85 1,15 1,4 1,9 2,3 3,3 Socket no. 6 8 10 20 25 30 45 A ref. 1,75 2,4 2,8 3,95 4,5 5,6 7,95 max. 0,84 1,04 1,27 1,80 2,03 2,42 3,31 Hexalobular socket t min. 0,71 0,91 1,01 1,42 1,65 2,02 2,92 lelsand lglslglslglslglslglslglslglslgnom. min. max. min. max. min. max. min. max. min.
33、max. min. max. min. max. min. max.3 2,8 3,2 4 3,76 4,24 5 4,76 5,24 6 5,76 6,24 8 7,71 8,29 10 9,71 10,29 12 11,65 12,35 16 15,65 16,35 20 19,58 20,42 2 4 25 24,58 25,42 5,75 8 4,5 7 30 29,58 30,42 9,5 12 6,5 10 4 8 35 34,5 35,5 11,5 15 9 13 6 11 40 39,5 40,5 16,5 20 14 18 11 16 5,75 12 45 44,5 45,5
34、 19 23 16 21 10,75 17 50 49,5 50,5 24 28 21 26 15,75 22 55 54,4 55,6 26 31 20,75 27 60 59,4 60,6 31 36 25,75 32 65 64,4 65,6 30,75 37 70 69,4 70,6 35,75 42 80 79,4 80,6 45,75 52 BS EN ISO 14579:2011ISO 14579:2011(E) 4 ISO 2011 All rights reservedTable 1 (continued) Dimensions in millimetres Thread,
35、d M10 M12 (M14)fM16 (M18)fM20 Pa1,5 1,75 2 2 2,5 2,5 bbref. 32 36 40 44 48 52 max.c16,00 18,00 21,00 24,00 27,00 30,00 max.d16,27 18,27 21,33 24,33 27,33 30,33 dkmin. 15,73 17,73 20,67 23,67 26,67 29,67 damax. 11,2 13,7 15,7 17,7 20,2 22,4 max. 10,00 12,00 14,00 16,00 18,00 20,00 dsmin. 9,78 11,73 1
36、3,73 15,73 17,73 19,67 lfmax. 1,02 1,45 1,45 1,45 1,87 2,04 max. 10,00 12,00 14,00 16,00 18,00 20,00 k min. 9,64 11,57 13,57 15,57 17,57 19,48 r min. 0,4 0,6 0,6 0,6 0,6 0,8 v max. 1 1,2 1,4 1,6 1,8 2 dwmin. 15,33 17,23 20,17 23,17 25,87 28,87 w min. 4 4,8 5,8 6,8 7,8 8,6 Socket no. 50 55 60 70 80 9
37、0 A ref. 8,95 11,35 13,45 15,7 17,75 20,2 max. 4,02 5,21 5,99 7,01 8,00 9,20 Hexalobular socketet min. 3,62 4,82 5,62 6,62 7,50 8,69 lglsand lglslglslglslglslglslglslgnom. min. max. min. max. min. max. min. max. min. max. min. max. min. max. 16 15,65 16,35 20 19,58 20,42 25 24,58 25,42 30 29,58 30,4
38、2 35 34,5 35,5 40 39,5 40,5 45 44,5 45,5 5,5 13 50 49,5 50,5 10,5 18 55 54,4 55,6 15,5 23 10,25 29 60 59,4 60,6 20,5 28 15,25 24 10 20 65 64,4 65,6 25,5 33 20,25 29 15 25 11 21 70 69,4 70,6 30,5 38 25,25 34 20 30 16 26 9,5 22 80 79,4 80,6 40,5 48 35,25 44 30 40 26 36 19,5 32 15,5 28 90 89,3 90,7 50,
39、5 58 45,25 54 40 50 36 46 29,5 42 25,5 38 100 99,3 100,7 60,5 68 55,25 64 50 60 46 56 39,5 52 35,5 48 110 109,3 110,7 65,25 74 60 70 56 66 49,5 62 45,5 58 120 119,3 120,7 75,25 84 70 80 66 76 59,5 72 55,5 68 130 129,2 130,8 80 90 76 86 69,5 82 65,5 78 140 139,2 140,8 90 100 86 96 79,5 92 75,5 88 150
40、 149,2 150,8 96 106 89,5 102 85,5 98 160 159,2 160,8 106 116 99,5 112 95,5 108 180 179,2 180,8 119,5 132 115,5 128 200 199,075 200,925 135,5 148 aP is the pitch of the thread. bFor lengths below the discontinuous, stepped line. cFor plain heads. dFor knurled heads. eFor the acceptance of the hexalob
41、ular socket and for gauges, see ISO 10664. fSizes in parentheses should be avoided, if possible. gThe range of preferred lengths is between the solid, bold, stepped lines. Lengths above the dashed, stepped line are threaded to the head within 3P. Lengths below the discontinuous, stepped line have va
42、lues of lgand lsin accordance with the following equation: lg,max= lnom b; ls,min= lg,max 5P. BS EN ISO 14579:2011ISO 14579:2011(E) ISO 2011 All rights reserved 54 Specifications and reference International Standards See Table 2. Table 2 Specifications and reference International Standards Material
43、Steel Stainless steel Non-ferrous metal General requirements International Standard ISO 8992 Tolerance class 5g6g for property class 12.9/12.9; for other property classes: 6g Thread International Standard ISO 261, ISO 965-2, ISO 965-3 Property class M12, and to mark them accordingly. 5 Designation E
44、XAMPLE A hexalobular socket head cap screw with thread M5, nominal length l = 20 mm and property class 8.8 is designated as follows: Hexalobular socket head cap screw ISO 14579 - M5 20 - 8.8 BS EN ISO 14579:2011ISO 14579:2011(E) 6 ISO 2011 All rights reservedAnnex A (informative) Masses of carbon st
45、eel screws In Table A.1, approximate masses of carbon steel screws with preferred lengths are given for information only. Table A.1 Approximate mass of carbon steel screws Thread, d M2 M2,5 M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 Nominal length l Approximate mass of carbon steel screws, in kilograms
46、per 1 000 pieces (r = 7,85 kg/dm3) 3 0,155 4 0,175 0,345 5 0,195 0,375 0,67 6 0,215 0,405 0,71 1,50 8 0,255 0,465 0,80 1,65 2,45 10 0,295 0,525 0,88 1,80 2,70 4,70 12 0,355 0,585 0,96 1,95 2,95 5,07 10,9 16 0,415 0,705 1,16 2,25 3,45 5,75 12,1 20,9 20 0,495 0,825 1,36 2,65 4,01 6,53 13,4 22,9 32,1 2
47、5 0,975 1,61 3,15 4,78 7,59 15,0 25,4 35,7 48,0 71,3 30 1,86 3,65 5,55 8,30 16,9 27,9 39,3 53,0 77,8 111 128 35 4,15 6,32 9,91 18,9 30,4 42,9 58,0 84,4 120 139 40 4,65 7,09 11,0 20,9 32,9 46,5 63,0 91,0 129 150 45 7,86 12,1 22,9 36,1 50,1 68,0 97,6 128 161 50 8,63 13,2 24,9 30,3 54,5 73,0 106 147 17
48、2 55 14,3 26,9 42,5 58,9 78,0 114 156 183 60 15,4 28,9 45,7 63,4 84,0 122 165 194 65 31,0 48,9 67,8 90,0 130 174 205 70 33,0 52,1 71,3 96,0 138 183 216 80 37,0 58,5 80,2 108 154 203 241 90 64,9 89,1 120 170 223 266 100 71,2 98,0 132 186 243 291 110 107 144 202 263 316 120 116 156 218 283 341 130 168 234 303 366 140 180 250 323 391 150 266 343 416 160 282 363 441 180 403 491 200 541 BS EN ISO 14579:2011ISO 14579:2011(E) ISO 2011 All rights reserved 7Bibliography 1 ISO 888, Bolts, screws and studs
