1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 7042:2012Prevailing torque type all-metal hexagon high nuts Property classes 5, 8, 10 and 12 Copyright European Committee for Standardization Provided by IHS under lice
2、nse with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 7042:2012.It supersedes BS EN ISO 7042:1998 which is withdrawn.The UK participation in its prep
3、aration was entrusted to TechnicalCommittee FME/9, Fasteners.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The
4、British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 77983 1ICS 21.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 Jan
5、uary 2013.Amendments issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7042 Decem
6、ber 2012 ICS 21.060.20 Supersedes EN ISO 7042:1997English Version Prevailing torque type all-metal hexagon high nuts - Property classes 5, 8, 10 and 12 (ISO 7042:2012) crous hexagonaux hauts autofreins tout mtal - Classes de qualit 5, 8, 10 et 12 (ISO 7042:2012) Sechskantmuttern mit Klemmteil (Ganzm
7、etallmuttern), Typ 2 - Festigkeitsklassen 5, 8, 10 und 12 (ISO 7042:2012) This European Standard was approved by CEN on 3 December 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national
8、 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 versions (English, French, German). A version
9、 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, Belgium, Bulgaria, Croatia, Cyprus, Czec
10、h Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EU
11、ROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7042:2012: ECopyright
12、European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012EN ISO 7042:2012 (E) 3 Foreword This document (EN ISO 7042:2012) has been prepared by Technical Committee ISO/TC 2 “Faste
13、ners“ 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 standard, either by publication of an identical text or by endorsement, at the latest by June 2013, and conflicting national
14、standards shall be withdrawn at the latest by June 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN I
15、SO 7042:1997. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedoni
16、a, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7042:2012 has been approved by CEN as
17、a EN ISO 7042:2012 without any modification. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012ISO 7042:2012(E) ISO 2012 All rights reserved iiiContents PageFore
18、word iv1 Scope 12 Normative references . 13 Dimensions . 24 Requirements and reference International Standards 35 Designation . 3Bibliography . 4Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without licens
19、e from IHS-,-,-BS EN ISO 7042:2012ISO 7042:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each
20、member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
21、 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards ad
22、opted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval 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 pat
23、ent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 7042 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 12, Fasteners with metric internal thread.This third edition cancels and replaces the second edition (ISO 7042:1997), of which
24、 it constitutes a minor revision.iv ISO 2012 All rights reservedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012INTERNATIONAL STANDARD ISO 7042:2012(E)Prevaili
25、ng torque type all-metal hexagon high nuts Property classes 5, 8, 10 and 121 ScopeThis International Standard specifies the characteristics of prevailing torque type all-metal hexagon high nuts, with threads from M5 up to and including M36, in product grade A for threads up to and including M16 and
26、product grade B for threads above M16, and with property classes 5, 8, 10 and 12.NOTE 1 The dimensions of the nuts with the exception of the dimensions mwand hmaxcorrespond to those given in ISO 4033.NOTE 2 Nuts of property class 9 are dealt with in ISO 7720.If other specifications are required, the
27、y can be selected from existing International Standards, for example ISO 261, ISO 724, ISO 898-2, ISO 965-2, ISO 2320 and ISO 4759-1.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable to its application. For undated r
28、eferences, the latest edition of the referenced document (including any amendments) applies.ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensionsISO 261, ISO general purpose metric screw threads General planISO 724, ISO general-purpose metric screw threads Basic dim
29、ensionsISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel Part 2: Nuts with specified property classes Coarse thread and fine pitch threadISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal s
30、crew threads Medium qualityISO 2320, Prevailing torque type steel nuts Mechanical and performance propertiesISO 3269, Fasteners Acceptance inspectionISO 4042, Fasteners Electroplated coatingsISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and CISO 6157-
31、2, Fasteners Surface discontinuities Part 2: NutsISO 8992, Fasteners General requirements for bolts, screws, studs and nutsISO 10683, Fasteners Non-electrolytically applied zinc flake coatingsISO 10684, Fasteners Hot dip galvanized coatings ISO 2012 All rights reserved 1Copyright European Committee
32、for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012ISO 7042:2012(E)3 DimensionsSee Figure 1 and Table 1Symbols and descriptions of dimensions are specified in ISO 225.aPrevailing torque eleme
33、nt, shape at the discretion of the manufacturer.b = 15 to 30.c = 90 to 120.Figure 1Table 1 DimensionsDimensions in millimetresThread DM5 M6 M8 M10 M12 (M14)aM16 M20 M24 M30 M36Pb0,8 1 1,25 1,5 1,75 2 2 2,5 3 3,5 4damax. 5,75 6,75 8,75 10,80 13,00 15,10 17,30 21,60 25,90 32,40 38,90min. 5,00 6,00 8,0
34、0 10,00 12,00 14,00 16,00 20,00 24,00 30,00 36,00dwmin. 6,88 8,88 11,63 14,63 16,63 19,64 22,49 27,70 33,25 42,75 51,11e min. 8,79 11,05 14,38 17,77 20,03 23,36 26,75 32,95 39,55 50,85 60,79hmax. 5,10 6,00 8,00 10,00 13,30 14,10 16,40 20,30 23,90 30,00 36,00min. 4,80 5,40 7,14 8,94 11,57 13,40 15,70
35、 19,00 22,60 27,30 33,10mwmin. 3,52 3,92 5,15 6,43 8,30 9,68 11,28 13,52 16,16 19,44 23,52smax. 8,00 10,00 13,00 16,00 18,00 21,00 24,00 30,00 36,00 46,00 55,00min. 7,78 9,78 12,73 15,73 17,73 20,67 23,67 29,16 35,00 45,00 53,80aThe size in parentheses should be avoided, if possible.bP is the pitch
36、of the thread.2 ISO 2012 All rights reservedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012ISO 7042:2012(E)4 Requirements and reference International Standard
37、sSee Table 2.Table 2 Requirements and reference International StandardsMaterial SteelGeneral requirements International Standard ISO 8992Thread Tolerance class 6HInternational Standards ISO 261, ISO 724, ISO 965-2Mechanical and performance propertiesProperty class 5, 8, 10, 12International Standards
38、 ISO 898-2, ISO 2320Tolerance Product grade For D M16: AFor D M16: BInternational Standard ISO 4759-1Finish CoatingAs processedRequirements for electroplating are specified in ISO 4042.Requirements for non-electrolytically applied zinc flake coatings are specified in ISO 10683.Requirements for hot d
39、ip galvanizing are specified in ISO 10684.Additional requirements or other finishes or coatings shall be agreed between the supplier and the purchaser.Surface integrity Limits for surface discontinuities are specified in ISO 6157-2.Acceptability Acceptance inspection is specified in ISO 3269.5 Desig
40、nationEXAMPLE A prevailing torque type all-metal hexagon high nut, with thread M12 and property class 8 is designated as follows:Prevailing torque type hexagon high nut ISO 7042 - M12 - 8 ISO 2012 All rights reserved 3Copyright European Committee for Standardization Provided by IHS under license wit
41、h CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012ISO 7042:2012(E)Bibliography1 ISO 4033, Hexagon high nuts (style 2) Product grades A and B2 ISO 7720, Prevailing torque type all-metal hexagon nuts, style 2 Property class 94 ISO 2012 All right
42、s reservedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7042:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for Resale
43、No reproduction or networking permitted without license from IHS-,-,-This page deliberately left blankCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-This page deliberately left
44、blankCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BSI is the independent national body responsible for preparing British Standards and other standards-related publications, in
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