BS 3643-2-2007 ISO metric screw threads Part 2 Specification for selected limits of size
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ID： |
D57D4C637C0E401CACF5F2A9590070B6 |
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文件大小(MB)： |
0.36 |
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页数： |
48 |
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日期： |
2010-10-4 |
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文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
BS 3643-2:2007,ISO metric screw threads,Part 2: Specification for selected,limits of size,ICS 21.040.10,NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW,BRITISH STANDARD,Publishing and copyright information,The BSI copyright notice displayed in this document indicates when the,document was last issued.,. BSI 2007,ISBN 978 0 580 57925 7,The following BSI references relate to the work on this standard:,Committee reference FME/9,Draft for comment 07/30158488 DC,Publication history,First published June 1965,Second edition, December 1966,Thid edition, December 1981,Fourth edition, November 2007,Amendments issued since publication,Amd. no. Date Text affected,BS 3643-2:2007,. BSI 2007 ?i,BS 3643-2:2007,Contents,Foreword ii,1 Scope 1,2 Normative references 1,3 Terms and definitions 1,4 Designation 2,5 Requirements 2,Annexes,Annex A (normative) Fundamental deviations, tolerances and limits of,size for additional tolerance classes for aerospace use 39,Bibliography 42,List of tables,Table 1 – ISO metric screw threads – Limits and tolerances for finished,uncoated threads for normal length of engagement 3,Table A.1 – ISO metric screw threads – Limits and tolerances for,finished uncoated threads for normal length of engagement,for aerospace use 40,Summary of pages,This document comprises a front cover, an inside front cover,pages i and ii, pages 1 to 42, an inside back cover and a back cover.,BS 3643-2:2007,ii ?. BSI 2007,Foreword,Publishing information,This part of BS 3643 is published by BSI and came into effect,on 30 November 2007. It was prepared by Subcommittee SFTSE/1,Screws and fasteners technical specification committee, under the,authority of Technical Committee FME/9, Nuts, bolts and accessories.,A list of organizations represented on this committee can be obtained,on request to its secretary.,Supersession,This part of BS 3643 supersedes BS 3643-2:1981, which is withdrawn.,Relationship with other publications,BS 3643 consists of the following parts:,?Part 1: Principles and basic data;,?Part 2: Specification for selected limits of size.,Information about this document,This part of BS 3643 has been revised to bring it up to date.,Hazard warnings,Presentational conventions,The provisions of this standard are presented in roman (i.e. upright),type. Its requirements are expressed in sentences in which the principal,auxiliary verb is “shall”.,Commentary, explanation and general informative material is,presented in smaller italic type, and does not constitute a,normative element.,Contractual and legal considerations,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.,WARNING. Attention is drawn to the fact that, with the different,screw thread forms available, there is the possibility of a mismatch,which is potentially hazardous. It is the responsibility of the designer,of the end product to ensure that this possibility is reduced to a,minimum. For further information on mismatches of screw thread,systems see PD 6494.,. BSI 2007 ?1,BS 3643-2:2007,1 Scope,This part of this BS 3643 specifies the fundamental deviations,tolerances and limits of size for the tolerance classes 4H, 5H, 6H and,7H for internal threads and 4h, 6g and 8g for external threads where,appropriate for:,?a coarse pitch series with the range 1 mm to 68 mm diameter;,?a fine pitch series with the range 1 mm to 33 mm diameter;,?a constant pitch series with the range 8 mm to 300 mm diameter.,For certain diameter/pitch combinations, the fundamental deviations,tolerances and limits of size for tolerance class 4H for internal threads,and tolerance classes 6h and 4g for external threads, primarily for,aerospace use, are specified in Annex A.,2 Normative references,The following referenced documents are indispensable for the,application of this document. For dated references, only the edition,cited applies. For undated references, the latest edition of the,referenced document (including any amendments) applies.,BS 3643-1:2007, ISO metric screw threads – Principles and basic,data,3 Terms and definitions,For the purposes of this part of BS 3643 the terms and definitions given,in BS 3643-1:2007 apply.,BS 3643-2:2007,2 ?. BSI 2007,4 Designation,The complete designation for a screw thread shall comprise a,designation for the thread system and a designation for the thread,tolerance class in accordance with BS 3643-1:2007, 7.3.,EXAMPLES:,External thread,Internal thread,5 Requirements,Fundamental deviations, tolerances and limits of size shall be ……
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