BS EN ISO BRITISH STANDARD 10644:2009 Screw and washer assemblies made of steel with plain washers Washer hardness classes 200 HV and 300 HV ICS 21.060.10; 21.060.30 BSi NO COPYING WITHOUTBSI PERMISSIONEXCEPT AS PERMITTED BY COPYRIGHTLAW British Standards BSENISO10644:2009 National foreword This British Standard is the UK implementation of ENISO10644:2009. It supersedesBSENISO10644:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee FME/9/3, Product standards for fasteners. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard Amendments/corrigenda issued since publication was published under the authority of the Standards Date Policy and Strategy Comments Committeeon31 July 2009 BSI 2009 ISBN9780580583148 EN ISO 10644 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHENORM July 2009 ICS 21.060.30 Supersedes EN ISO 10644:1998 English Version Screw andwasherassembliesmadeofsteel withplainwashers Washerhardnessclasses200HVand300HV(iSO 10644:2009) Vis en aciera rondelle plate incorporee-Rondelles de Kombi-Schrauben aus Stahl mit flachen Scheiben - Harteklassen der Scheiben 200 HV und 300 HV (ISO 10644:2009) 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 any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG Management Centre:Avenue Marnix 17,B-1000 Brussels 2009CEN All rights of exploitation in any form and by any means reserved Ref.No.ENISO 10644:2009: E worldwide for CEN national Members. BSENISO10644:2009 ENISO10644:2009 (E) Foreword This document (EN ISO 10644:2009) 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 standard, either by publication of an identical text or by endorsement, at the latest by January 2010, and conflicting national standards shall be withdrawn at the latest by January 2010. 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 ISO 10644:1998 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Sweden, Switzerland and the United Kingdom. Endorsementnotice BS EN ISO 10644:2009 ISO10644:2009(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the Internatio