1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 7040:2012Prevailing torque type hexagon r e g u l a r n u t s ( w i t h n o n - m e t a l l i c insert) - Property classes 5, 8 and 10 (ISO 7040:2012)BS EN ISO 7040:201
2、2 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 7040:2012.It supersedes BS EN ISO 7040:1998 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9, Fasteners.A list of organizations represented on this committe
3、e 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 British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 77981 7ICS 21.060.20Comp
4、liance 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 January 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
5、EN ISO 7040 December 2012 ICS 21.060.20 Supersedes EN ISO 7040:1997English Version Prevailing torque type hexagon regular nuts (with non-metallic insert) - Property classes 5, 8 and 10 (ISO 7040:2012) crous hexagonaux normaux autofreins ( anneau non mtallique) - Classes de qualit 5, 8 et 10 (ISO 704
6、0:2012)Sechskantmuttern mit Klemmteil (mit nichtmetallischem Einsatz), Typ 1 - Festigkeitsklassen 5, 8 und 10 (ISO 7040:2012) 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 gi
7、ving this European 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 of
8、ficial versions (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
9、of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech 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
10、, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN 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 nati
11、onal Members. Ref. No. EN ISO 7040:2012: EBS EN ISO 7040:2012EN ISO 7040:2012 (E) 3 Foreword This document (EN ISO 7040:2012) 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 E
12、uropean 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 standards shall be withdrawn at the latest by June 2013. Attention is drawn to the possibility that some of the elemen
13、ts 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 ISO 7040:1997. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
14、 countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norwa
15、y, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7040:2012 has been approved by CEN as a EN ISO 7040:2012 without any modification. BS EN ISO 7040:2012ISO 7040:2012(E) ISO 2012 All rights reserved iiiConte
16、nts PageForeword iv1 Scope 12 Normative references . 13 Dimensions . 24 Requirements and reference International Standards 35 Designation . 3Bibliography . 4BS EN ISO 7040:2012ISO 7040:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national stand
17、ards 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. International orga
18、nizations, 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 the rules given i
19、n 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 by at least 75 %
20、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 7040 was prepared by Technical Committee ISO/TC 2, Fasteners,
21、Subcommittee SC 12, Fasteners with metric internal thread.This third edition cancels and replaces the second edition (ISO 7040:1997), of which it constitutes a minor revision.iv ISO 2012 All rights reservedBS EN ISO 7040:2012INTERNATIONAL STANDARD ISO 7040:2012(E)Prevailing torque type hexagon regul
22、ar nuts (with non-metallic insert) Property classes 5, 8 and 101 ScopeThis International Standard specifies the characteristics of prevailing torque type hexagon regular nuts (with non-metallic insert), with threads from M3 up to and including M36, in product grade A for threads up to and including
23、M16 and product grade B for threads above M16, and with property classes 5, 8 and 10.NOTE The dimensions of the nuts correspond to those given in ISO 4032 plus prevailing torque feature.If other specifications are required, they can be selected from existing International Standards, for example ISO
24、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 references, the latest edition of the referenced document (including any a
25、mendments) 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 dimensionsISO 898-2, Mechanical properties of fasteners made of carbon steel
26、 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 screw threads Medium qualityISO 2320, Prevailing torque type steel nuts Me
27、chanical 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 6157-2, Fasteners Surface discontinuities Part 2: NutsISO 8992, Fasteners Gene
28、ral requirements for bolts, screws, studs and nutsISO 10683, Fasteners Non-electrolytically applied zinc flake coatings ISO 2012 All rights reserved 1BS EN ISO 7040:2012ISO 7040:2012(E)3 DimensionsSee Figure 1 and Table 1. Symbols and descriptions of dimensions are specified in ISO 225.a Prevailing
29、torque element, shape at the discretion of the manufacturer.b = 15 to 30.c = 90 to 120.Figure 1Table 1 DimensionsDimensions in millimetresThread DM3 M4 M5 M6 M8 M10 M12 (M14)aM16 M20 M24 M30 M36Pb0,5 0,7 0,8 1 1,25 1,5 1,75 2 2 2,5 3 3,5 4damax. 3,45 4,60 5,75 6,75 8,75 10,80 13,00 15,10 17,30 21,60
30、 25,90 32,40 38,90min. 3,00 4,00 5,00 6,00 8,00 10,00 12,00 14,00 16,00 20,00 24,00 30,00 36,00dwmin. 4,57 5,88 6,88 8,88 11,63 14,63 16,63 19,64 22,49 27,70 33,25 42,75 51,11e min. 6,01 7,66 8,79 11,05 14,38 17,77 20,03 23,36 26,75 32,95 39,55 50,85 60,79hmax. 4,50 6,00 6,80 8,00 9,50 11,90 14,90 1
31、7,00 19,10 22,80 27,10 32,60 38,90min. 4,02 5,52 6,22 7,42 8,92 11,20 14,20 15,90 17,80 20,70 25,00 30,10 36,40m min. 2,15 2,90 4,40 4,90 6,44 8,04 10,37 12,10 14,10 16,90 20,20 24,30 29,40mwmin. 1,72 2,32 3,52 3,92 5,15 6,43 8,30 9,68 11,28 13,52 16,16 19,44 23,52smax. 5,50 7,00 8,00 10,00 13,00 16
32、,00 18,00 21,00 24,00 30,00 36,00 46,00 55,00min. 5,32 6,78 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 of the thread.2 ISO 2012 All rights reservedBS EN ISO 7040:2012ISO 7040:2012(E)4 Requirements and referen
33、ce International StandardsSee Table 2.Table 2 Requirements and reference International StandardsMaterial Nut body SteelInsert For example, polyamideGeneral requirements International Standard ISO 8992ThreadTolerance class 6HInternational Standards ISO 261, ISO 724, ISO 965-2Mechanical and performanc
34、e propertiesProperty classD 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.Additional requirements or other finishes or coatings sh
35、all be agreed between the supplier and the purchaser.Surface integrityLimits for surface discontinuities are specified in ISO 6157-2.Acceptability Acceptance inspection is specified in ISO 3269.5 DesignationEXAMPLE A prevailing torque type hexagon regular nut, with non-metallic insert, thread M12 an
36、d property class 8 is designated as follows:Prevailing torque type hexagon regular nut ISO 7040 - M12 - 8 ISO 2012 All rights reserved 3BS EN ISO 7040:2012ISO 7040:2012(E)Bibliography1 ISO 4032, Hexagon regular nuts (style 1) Product grades A and B4 ISO 2012 All rights reservedBS EN ISO 7040:2012Thi
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