BS-A-320-1997 ISO-12273-1997.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS A 320:1997 ISO 12273: 1997 Aerospace Nuts, anchor, self-locking, floating, self-aligning, two lug, with MJ threads, classifications: 900 MPa (at ambient temperature)/235 C, 900 MPa (at ambient temperature)/315 C, 900 MPa (at ambient temperature)/425 C Dimensions
2、ICS 49.030.30 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 320:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of
3、the Standards Board and comes into effect on 15 October 1997 BSI 09-1999 ISBN 0 580 28731 9 National foreword This British Standard reproduces verbatim ISO 12273:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee ACE/12, A
4、erospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastening systems (international), which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or pr
5、oposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement
6、international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to
7、 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 pages This document comprises a front cover, an inside front cover,
8、pages i and ii, the ISO title page, pages ii to iv, pages 1 and 2 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. Amendments issued since publication Amd. No.DateC
9、omments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 320:1997 BSI 09-1999i Contents Page National forewordInside front cover Forewordiii Text of ISO 122731 Licensed Copy: London South Bank University, L
10、ondon South Bank University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Ban
11、k University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 320:1997 ii BSI 09-1999 Contents Page Forewordiii Introduction1 1Scope1 2Normative references1 3Configuration and dimensions1 Figure 12 Table 12 Descriptors: Aircraft industry, fasteners, MJ threads, nuts (fasteners) a
12、nchor nuts, self-locking nuts, two lug nuts, floating nuts, classification, form specifications, dimensions. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 320:1997 BSI 09-1999iii Foreword ISO (the Intern
13、ational Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has b
14、een established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical sta
15、ndardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 12273 was prepared by Technical
16、Committee ISO/TC 20, Aircarft and space vehicles, Subcommittee SC 4, Aerospace fastener systems. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London Sout
17、h Bank University, Sat Dec 09 03:33:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 320:1997 BSI 09-19991 Introduction The dimensions specified in this International Standard have been determined to satisfy the requirements of the procurement specification of ISO 5858. 1 Scope This International
18、Standard specifies the dimensions of floating, self-aligning, two lug anchor nuts, with MJ threads and a self-locking feature achieved by forming the upper portion out-of-round, of classifications: 900 MPa 1)/235 C 2), 900 MPa 1)/315 C 2) and 900 MPa 1)/425 C 2). This International Standard is only
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