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1、BRITISH STANDARD BS EN 20225:1992 ISO 225:1983 Fasteners Bolts, screws, studs and nuts Symbols and designations of dimensions The European Standard EN 20225:1991 has the status of a British Standard BS EN 20225:1992 This British Standard, having been prepared under the direction of the General Mecha
2、nical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 1 April 1992 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference GME/9 Draft for comment 82/70258 DC ISBN 0 580 20728 5 Cooper
3、ating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries. AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk
4、Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazio
5、nale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige Swit
6、zerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments BS EN 20225:1992 BSI 08-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 202253 National annex NA (i
7、nformative) Committees responsibleInside back cover National annex NB (informative) Cross-referencesInside back cover BS EN 20225:1992 ii BSI 08-1999 National foreword This British Standard has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee and is
8、the English language version of EN 20225:1991, “Fasteners Bolts, screws and nuts Symbols and designations of dimensions”, published by the European Committee for Standardization (CEN).It is identical with ISO 225:1983, published by the International Organization for Standardization (ISO). EN 20225:1
9、991 was produced as a result of international discussion in which the UK took an active part. BS 6565:1985 was identical to ISO 225:1983 but is now superseded and withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are resp
10、onsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 22, an inside back cover and a back cover.
11、 This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 20225 October 1991 UDC 621.882.2/.3 Descriptors: Fasteners, bolts, screws, stud
12、s, nuts: fasteners, dimensions, dimensioning, symbols, designation English version Fasteners Bolts, screws, studs and nuts Symbols and designations of dimensions (ISO 225:1983) Elments de fixation Boulons, vis, goujons et crous Symboles et dsignations des dimensions (ISO 225:1983) Mechanische Verbin
13、dungselemente Schrauben und Muttern Bemaung (ISO 225:1983) This European Standard was approved by CEN on 1991-10-10. 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 standard without an
14、y alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by
15、 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lux
16、embourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1991 Copyright reserved to all CEN members Ref.
17、 No. EN 20225:1991 E EN 20225:1991 BSI 08-1999 2 Foreword In 1990, ISO 225:1983 was submitted to the CEN P.Q. procedure. Following the positive result of the P.Q., CEN/BT agreed to submit ISO 225:1983 with the following modifications to Formal Vote. In the French version, replace “boulon, vis” by “v
18、is”. In accordance with the Common CEN/CENELEC Rules, the following countries are bound to impelement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom
19、. Contents Page Foreword2 1Scope and field of application3 2References3 3Bolts, screws and studs4 4Nuts18 Figure 14 Figure 25 Figure 3 6 Figure 46 Figure 57 Figure 67 Figure 77 Figure 87 Figure 98 Figure 108 Figure 119 Figure 129 Figure 1318 Figure 1418 EN 20225:1991 BSI 08-19993 EN 20225:1991 4 BSI
20、 08-1999 EN 20225:1991 BSI 08-19995 EN 20225:1991 6 BSI 08-1999 EN 20225:1991 BSI 08-19997 EN 20225:1991 8 BSI 08-1999 EN 20225:1991 BSI 08-19999 EN 20225:1991 10 BSI 08-1999 EN 20225:1991 BSI 08-199911 EN 20225:1991 12 BSI 08-1999 EN 20225:1991 BSI 08-199913 EN 20225:1991 14 BSI 08-1999 EN 20225:19
21、91 BSI 08-199915 EN 20225:1991 16 BSI 08-1999 EN 20225:1991 BSI 08-199917 EN 20225:1991 18 BSI 08-1999 EN 20225:1991 BSI 08-199919 EN 20225:1991 20 BSI 08-1999 EN 20225:1991 BSI 08-199921 22 blank BS EN 20225:1992 BSI 08-1999 National annex NA (informative) Committees responsible The United Kingdom
22、participation in the preparation of this European Standard was entrusted by the General Mechanical Engineering Standards Policy Committee (GME/-) to Technical Committee GME/9, upon which the following bodies were represented: BEAMA Ltd. British Constructional Steelwork Association Ltd. British Indus
23、trial Fasteners Federation British Railways Board British Steel Industry British Steel Industry (Wire Section) Gauge and Tool Makers Association Ministry of Defence Society of Motor Manufacturers and Traders Ltd. Washer Manufacturers Association of Great Britain The following bodies also participate
24、d in the preparation of the standard, through subcommittees and panels: British Furniture Manufacturers Federation British Independent Steel Producers Association British Plastics Federation British Turned-parts Manufacturers Association EEA (the Electronic and Business Equipment Association) Genera
25、l Municipal Boilermaker and Allied Trades Union Institute of Metal Finishing National Association of Fastener Stockholders Portable Electric Tool Manufacturers Association Screw Thread Tool Manufacturers Association Small Electrical Appliances Marketing Association Society of British Aerospace Compa
26、nies Ltd. Steel Construction Institute Telecommunications Engineering and Manufacturing Association Timber Trade Federation Yarsley Technical Centre Ltd. National annex NB (informative) Cross-references Publication referred toCorresponding British Standard ISO 261:1973BS 3643 ISO metric screw thread
27、s ISO 262:1973 Part 1:1981 Principles and basic data ISO 4753:1983BS 6567:1985 Specification for ends of fasteners with external metric ISO thread BS EN 20225:1992 ISO 225:1983 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible
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