1、BRITISH STANDARD AEROSPACE SERIES BSA335:1999 ISO3222:1998 Nuts, anchor, self-locking, fixed, closed corner, reduced series, with counterbore, with MJ threads, classifications: 1100 MPa (at ambient temperature)/235 C, 1100MPa (at ambient temperature)/315 C and1100MPa (atambient temperature)/425 C Di
2、mensions ICS 49.030.30BSA335:1999 This British Standard, having been prepared under the directionof the Engineering SectorCommittee, was publishedunder the authority ofthe Standards Committee andcomes into effect on 15 February1999 BSI 05-1999 ISBN 0 580 32169 X National foreword This British Standa
3、rd reproduces verbatim ISO3222:1998 and 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), whic
4、h has the responsibility to: aid enquirers 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
5、 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 international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section e
6、ntitled “International Standards Correspondence 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. Comp
7、liance 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, pages i and ii, theISO title page, pageii, pages1 and2 and a back cover. This standard has been updated (see copyright date) and ma
8、y have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSA335:1999 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword ii Introduction 1 1 Scope 1 2 Normative referen
9、ces 1 3 Configuration and dimensions 1 Figure 1 2 Table 1 2ii blankBSA335:1999 ii BSI05-1999 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 normally carried
10、 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 the work. ISO
11、 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, Part3. Draft International Standards adopted by the technical committee
12、s are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO3222 was prepared by Technical Committee ISO/TC20, Aircraft and space vehicles, Subcommittee SC4, Aerospace faste
13、ner systems. This second edition cancels and replaces the first edition (ISO3222:1989), which has been technically revised. Descriptors: Aircraft industry, fasteners, MJ threads, nuts (fasteners), anchor nuts, self-locking nuts, counterbore nuts, classification, form specifications, dimensions.BSA33
14、5:1999 BSI 05-1999 1 Introduction The dimensions specified in this International Standard have been determined to allow production of a part which will satisfy the requirements of the procurement specification ISO5858. 1 Scope This International Standard specifies the dimensions of self-locking, fix
15、ed, closed corner anchor nuts, reduced series, with counterbore, withMJ threads, of classifications: 1100MPa 1) /235C2) , 1100MPa 1) /315C2)and1100MPa 1) /425C 2) . This International Standard is only applicable for the compilation of aerospace product standards. 2 Normative references The following
16、 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 this International Sta
17、ndard 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 valid International St
18、andards. ISO5855-2:1988, Aerospace MJ threads Part2:Limit dimensions for bolts and nuts. ISO5858:1991, Aerospace Self-locking nuts with maximum operating temperature less than or equal to425C Procurement specification. ISO8788:1987, Aerospace Fasteners Tolerances of form and position for nuts. 3 Con
19、figuration and dimensions See Figure 1 and Table 1. Dimensions and tolerances are expressed in millimetres. They apply after any surface coating(s) but before the application of any lubricant. The metallic cap (optional) shall remain joined to the nut at the maximum operating temperature (typeofatta
20、chment at the users discretion). See ISO5858 for the test conditions. 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to
21、 withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the surface treatment.BSA335:1999 2 BSI 05-1999 Table 1 Tolerances of form and position shall conform to those specified in ISO 8788. Detai
22、ls of form not stated are at the manufacturers discretion. a These values, in micrometres, apply before any surface coating(s) is (are) applied. The values do not apply to threads, punched holes or shear edges the surface texture of which will be as achieved by the usual manufacturing methods. b Too
23、ling marks permissible in this area Figure 1 Diameter code Thread a C D E F G H J b K L M N P c Q R W max. max. min. min. max. max. max. max. max. max. max. max. 040 MJ4 0,7-4H6H 0,4 6,6 6 4,4 2,2 6,2 4 12 5,8 1 11 13 2,5 10,5 050 MJ5 0,8-4H6H 8,1 7 5,5 5,5 2,4 7,3 4,5 13,6 6,9 11,4 13,4 060 MJ6 1-4
24、H5H 9,2 8 6,5 2,7 8,7 5 15,7 8,1 1,2 12,7 14,7 3 11,5 a In accordance with ISO5855-2. In the self-locking zone, the tolerances apply before forming out-of-round. b Measured at sharp corners (chamfered) or point of tangency (radiused) c Maximum protrusion of the boltblankBSA335:1999 ISO3222:1998 BSI
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