BS-A-312-1997 ISO-12260-1996.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS A 312:1997 ISO 12260:1996 Aerospace Screws, pan head, internal offset cruciform ribbed or unribbed drive, stepped shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa Dimensions ICS 49.0
2、30.20 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:32:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 312:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Stan
3、dards Board and comes into effect on 15 March 1997 BSI 01-1999 The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for comment 94/712751 DC ISBN 0 580 26647 8 Committees responsible for this British Standard The preparation of this British Standard was
4、entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the following bodies were represented: British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No.DateComments Licensed C
5、opy: London South Bank University, London South Bank University, Sat Dec 09 03:32:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 312:1997 BSI 01-1999i Contents Page Committees responsible Inside front cover National foreword ii 1Scope 1 2Normative references 1 3Configuration and dimensions 1 Fig
6、ure 1 1 Table 1 2 List of references Inside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:32:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 312:1997 ii BSI 01-1999 National foreword This British Standard has been prepared by Technical Committ
7、ee ACE/12. It is identical with ISO 12260:1996, Aerospace Screws, pan head, internal offset cruciform ribbed or unribbed drive, stepped shank, short or medium length MJ thread, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa Dimensions, published by the Intern
8、ational Organization for Standardization (ISO). 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 obliga
9、tions. Cross-references Publication referred toCorresponding British Standard ISO 286-2:1988BS EN 20286-2:1993 ISO system of limits and fits. Tables of standard tolerance grades and limit deviations for holes and shafts (Identical) ISO 3353:1992BS 2A 231:1993 Rolled threads for bolts. Lead and runou
10、t requirements (Identical) ISO 5855-2:1988BS 6293 Aerospace. MJ threads Part 2:1994 Limit dimensions for bolts and nuts (Identical) ISO 7913:1994BS 2A 296:1995 Bolts and screws, metric. Tolerances of form and position (Identical) Summary of pages This document comprises a front cover, an inside fron
11、t cover, pages i and ii, pages 1 and 2, 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 the inside front cover. Licensed Copy: London South Bank University, London So
12、uth Bank University, Sat Dec 09 03:32:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 312:1997 BSI 01-19991 1 Scope This International Standard specifies the dimensions of pan head screws with internal offset cruciform ribbed or unribbed drive, stepped shank, short or medium length MJ threads, in
13、 metallic material, coated or uncoated, with strength classes less than or equal to 1 100 MPa. This International Standard is applicable to the compilation of aerospace product standards. 2 Normative references The following standards contain provisions which, through reference in this text, constit
14、ute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of th
15、e standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 286-2:1988, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts. ISO 3353:1992, Aerospace Rolled threads for bolts Le
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