BS-A-342-1999 ISO-9139-1998.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS A 342:1999 ISO 9139:1998 Nuts, plain or slotted (castellated) Procurement specification ICS 49.030.30 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 342:1999 This Brit
2、ish Standard, 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 March 1999 BSI 05-1999 ISBN 0 580 32260 2 National foreword This British Standard reproduces verbatim ISO 9139:1998 and
3、 implements 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 enquir
4、ers to understand 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 rep
5、resented on 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 Corres
6、pondence Index”, 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
7、 of itself confer 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 14 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorp
8、orated. This 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 03:36:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 342:1999 BSI 05-199
9、9i Contents Page National forewordInside front cover Forewordiii Text of ISO 91391 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank Univers
10、ity, Sat Dec 09 03:36:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 342:1999 ii BSI 05-1999 Contents Page Forewordiii 1 Scope1 2 Normative references1 3 Term
11、s and definitions1 4 Quality assurance2 4.1 General2 4.1.1 Approval of manufacturers2 4.1.2 Qualification of nuts2 4.1.3 Production acceptance of nuts2 4.2 Qualification inspection and test conditions3 4.3 Production acceptance inspection and test conditions3 4.4 Use of “Statistical process control
12、(SPC)”3 5 Technical requirements3 Annex A (normative) Types of permissible surface discontinuity14 Annex B (informative) Cross-sectional area formula14 Figure A.114 Table 1 Technical requirements4 Table 2 Summary of qualification and production acceptance inspections and tests8 Table 3 Loads to be a
13、pplied in the 80 % axial load test9 Table 4 Loads to be applied in the 100 % axial load test 10 Table 5 Torques to be applied in the stress embrittlement test 11 Table 6 Classification of visual and dimensional inspections11 Table 7 Sampling plans for visual and dimensional inspections12 Table 8 Sam
14、pling plans for the inspection of mechanical and metallurgical characteristics12 Table 9 Maximum depth of permissible surface discontinuities13 Descriptors: Aircraft industry, fasteners, MJ threads, nuts (fasteners), specifications, mechanical properties, quality assurance, marking, metric system. L
15、icensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 342:1999 BSI 05-1999iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member b
16、odies). 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 been established has the right to be represented on that committee. International organizations, governmental a
17、nd 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 standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives
18、, Part 3. 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 9139 was prepared by Technical Commi
19、ttee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener systems. Annex A forms an integral part of this International Standard. Annex B is for information only. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:42 GMT+00:00 2006, U
20、ncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:36:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 342:1999 BSI 05-19991 1 Scope This International Standard specifies the required characteristics for metric plain or slott
21、ed (castellated) nuts, with MJ threads according to ISO 5855-2, for use in aerospace construction. It is applicable to nuts as defined above, provided that reference is made to this International Standard in the relevant definition document. 2 Normative references The following normative documents c
22、ontain 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 this International Standard are encouraged t
23、o 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 valid International Standards. ISO 1463:1982
24、, Metallic and oxide coatings Measurement of coating thickness Microscopical method. ISO 2859-1:1989, Sampling procedures for inspection by attributes Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. ISO 3452:1984, Non-destructive testing Penetrant inspecti
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