《BS-EN-20273-1992.pdf》由会员分享，可在线阅读，更多相关《BS-EN-20273-1992.pdf（10页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 20273: 1992 ISO 273:1979 Fasteners Clearance holes for bolts and screws The European Standard EN 20273:1991 has the status of a British Standard BS EN 20273:1992 This British Standard, having been prepared under the direction of the General Mechnical Engineering Standards Poli
2、cy Committee, was published under the authority of the Standards Board and comes into effect on 1 April 1992 BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference GME/9 Draft for comment 78/70483 DC ISBN 0 580 20714 5 Cooperating organizations The European
3、 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 Standardiseringsraad FinlandSuom
4、en 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 Nazionale Italiano di Unificazione Lu
5、xembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de nor
6、malisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments BS EN 20273:1992 BSI 02-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 202733 National annex NA (informative)Inside back cover BS
7、EN 20273:1992 ii BSI 02-1999 National foreword This British Standard has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee and is the English language version of EN 20273:1991, “Fasteners Clearance holes for bolts and screws”, published by the Europea
8、n Committee for Standardization (CEN). It is identical with ISO 273:1979, published by the International Organization for Standardization (ISO). EN 20273:1991 was produced as a result of international discussion in which the UK took an active part. BS 4186:1984 was identical to ISO 273:1979 but is n
9、ow superseded and withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of p
10、ages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on th
11、e inside front cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 20273 October 1991 UDC 621.882.2:621.882.15 Descriptors: Fasteners, bolts, screws, dimensions, hole size, dimensional tolerances English version Fasteners Clearance holes for bolts and screws (ISO 273:1979) Elments de fixatio
12、n Trous de passage pour boulons et vis (ISO 273:1979) Mechanische Verbindungselemente Durchgangslcher fr Schrauben (ISO 273:1979) 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 giv
13、ing 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 Central Secretariat or to any CEN member. This European Standard exists in three official vers
14、ions (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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
15、Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, 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
16、36, B-1050 Brussels CEN 1991 Copyright reserved to all CEN members Ref. No. EN 20273:1991 E EN 20273:1991 BSI 02-1999 2 Foreword In 1990, ISO 273:1979 was submitted to the CEN P.Q. procedure. Following the positive result of the P.Q., CEN/BT agreed to submit ISO 273:1979 with the following modificat
17、ions to Formal Vote. In the French version, replace “boulon” by “vis”, “boulon, vis” by “vis”. In accordance with the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
18、 Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Swtizerland and United Kingdom. Contents Page Foreword2 1Scope and field of application3 2Dimensions3 EN 20273:1991 BSI 02-19993 1 Scope and field of application This International Standard specifies clearance hole diameters for general purp
19、ose applications. These values result from bearing area calculations in connection with ISO bolt and nut product standards. NOTEClearance holes for special applications should be selected on the basis of design requirements. 2 Dimensions Dimensions in milimetres Thread diameter d Clearance hole dh T
20、hread diameter d Clearance hole dh Series:Series: finemediumcoarsefinemediumcoarse 11,11 21,342434548 1,21,31,41,545464852 1,41,51,61,848505256 1,61,71,8252545662 1,822,12,256586266 22,22,42,660626670 2 52,72,93,164667074 33,23,43,668707478 3,53,73,94,272747882 44,34,54,876788286 4,54,855,380828691
21、55,35,55,885879196 66,46,67909396101 77,47,689598101107 88,4910100104107112 1010,51112105109112117 121313,514,5110114117122 141515,516,5115119122127 161717,518,5120124127132 18192021125129132137 20212224130134137144 22232426140144147155 24252628150155158165 27283032 30313335 33343638 36373942 394042
22、45 EN 20273:1991 4 BSI 02-1999 The following tolerance fields are given for information only, for use where it is desirable to specify tolerances: fine series: H12 medium series: H13 coarse series: H14 In cases where it is necessary to avoid interference between the edge of the hole and the underhea
23、d fillet of the bolt, a chamfer is recommended. BS EN 20273:1992 BSI 02-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the General Mechanical Engineering Standards Policy Committee (GME/-) to
24、Technical Committee GME/9, upon which the following bodies were represented: BEAMA Ltd. British Constructional Steelwork Association Ltd. British Industrial Fasteners Federation British Railways Board British Steel Industry British Steel Industry (Wire Section) Gauge and Tool Makers Association Mini
25、stry of Defence Society of Motor Manufacturers and Traders Ltd. Washer Manufacturers Association of Great Britain The following bodies also participated in the preparation of the standard, through subcommittees and panels: Defence Manufacturers Association General Municipal Boilermaker and Allied Tr
26、ades Union Screw Thread Tool Manufacturers Association Society of British Aerospace Companies Ltd. BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
27、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incor
28、porated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyo
29、ne finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PL
30、US which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international st
31、andards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Hel
32、p to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive s
33、ubstantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the intern
34、ational standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This
35、 does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070.