BS-A-343-1999 ISO-9140-1998.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS A 343: 1999 ISO 9140:1998 Nuts, plain or slotted (castellated) Test methods ICS 49.030.30 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 343:1999 This British Standard
2、, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 1999 BSI 02-2000 ISBN 0 580 32261 0 National foreword This British Standard reproduces verbatim ISO 9140:1998 and implements
3、it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee ACE/12, Aerospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastening systems (international), which has the responsibility to: aid enquirers to under
4、stand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals 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
5、this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Ind
6、ex”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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 c
7、onfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This
8、will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 343:1999 BSI 02-2000i Contents P
9、age National forewordInside front cover Forewordiii Text of ISO 91401 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec
10、09 03:36:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 343:1999 ii BSI 02-2000 Contents Page Forewordiii 1Scope1 2Normative references1 3Inspections and test
11、s1 Figure 12 Figure 23 Figure 34 Table 1 Pitch diameter of the mandrel of the bearing surface squareness test2 Descriptors: Aircraft industry, fasteners, MJ threads, nuts (fasteners), tests, hardness tests, mechanical tests, metric system. Licensed Copy: London South Bank University, London South Ba
12、nk University, Sat Dec 09 03:36:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 343:1999 BSI 02-2000iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is no
13、rmally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in
14、 the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the tech
15、nical 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 9140 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee S
16、C 4, Aerospace fastener systems. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:56 GMT+00:00 2006, Uncontrol
17、led Copy, (c) BSI BS A 343:1999 BSI 02-20001 1 Scope This International Standard specifies test methods for metric plain or slotted (castellated) nuts, with MJ threads in accordance with ISO 5855-2, for use in aerospace construction. It describes the test device and the method for each test. It is a
18、pplicable to nuts as defined above, provided that the relevant documents (product standard, definition document, procurement specification, etc.) refer to this International Standard. This International Standard is to be used in conjunction with ISO 9139 or any other similar document. 2 Normative re
19、ferences The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on
20、this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently
21、valid International Standards. ISO 691:1997, Assembly tools for screws and nuts Wrench and socket openings Tolerances for general use. ISO 1024:1989, Metallic materials Hardness test Rockwell superficial test (scales 15N, 30N, 45N, 15T, 30T and 45T). ISO 5855-2:1988, Aerospace MJ threads Limit dimen
22、sions for bolts and nuts. ISO 6507-1:1997, Metallic materials Vickers test hardness Part 1: Test method. ISO 6508:1986, Metallic materials Hardness test Rockwell test (scales A B C D E F G H K). ISO 9139:1998, Aerospace Nuts, plain or slotted (castellated) Procurement specification. 3 Inspections an
23、d tests 3.1 Hardness test 3.1.1 Procedure The procedure is a function of the nut configuration and of the available apparatus. The authorized procedures are as follows: Rockwell hardness, in accordance with ISO 6508; Vickers hardness HV 5 to HV 100, in accordance with ISO 6507-1; Rockwell superficia
24、l hardness, in accordance with ISO 1024; microhardness. 3.1.2 Method This test shall be carried out at ambient temperature. The measurement shall be taken on the bearing surface or on one of the flats. Should this not be possible, carry out this test on a cut section after moulding the nut into a th
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