1、BRITISH STANDARD AEROSPACE SERIES BS A329:1999 ISO3168:1998 Nuts, anchor, self-locking, fixed, single lug, with counterbore, with MJthreads, classifications: 1100MPa (at ambient temperature)/235C, 1100 MPa (at ambient temperature)/315C and1100MPa (atambient temperature)/425C Dimensions ICS49.030.30B
2、SA329:1999 This British Standard, having been prepared under the directionof the Engineering SectorCommittee, was publishedunder the authority ofthe Standards Committee andcomes into effect on 15 February 1999 BSI 04-1999 ISBN 0 580 30331 4 National foreword This British Standard reproduces verbatim
3、 ISO3168:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee ACE/12, Aerospace fasteners and fastener systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastener systems (international), which has the responsibility
4、 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 in the UK. A list of or
5、ganizations 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 entitled “International S
6、tandards 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. Compliance with a British St
7、andard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theISO title page, page ii, pages1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments in
8、corporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSA329:1999 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword ii Introduction 1 1 Scope 1 2 Normative references 1 3 Configuration an
9、d dimensions 1 Figure 1 2 Table 1 2ii blankBSA329:1999 ii BSI 04-1999 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 out through ISO techni
10、cal 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 collaborates closely w
11、ith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 least75% of t
12、he member bodies casting a vote. International Standard ISO3168 was prepared by Technical Committee ISO/TC20, Aircraft and space vehicles, Subcommittee SC4, Aerospace fastener systems. This second edition cancels and replaces the first edition (ISO3168:1986), which has been technically revised. Desc
13、riptors: Aircraft industry, fasteners, MJ threads, nuts (fasteners), anchor nuts, self-locking nuts, single-lug nuts, counterbore nuts, classification, form specifications, dimensions.BSA329:1999 BSI 04-1999 1 Introduction The dimensions specified in this International Standard have been determined
14、to satisfy the requirements of the procurement specification of ISO5858. 1 Scope This International Standard specifies the dimensions of self-locking, fixed, single lug anchor nuts, with counterbore, with MJ threads, for classifications1100MPa 1) /235C 2) , 1100 MPa 1) /315C 2)and1100 MPa 1) /425C 2
15、) . This International Standard is only applicable for the compilation of aerospace product standards. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editio
16、ns 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 the standards indicated below. Members of IEC and ISO maintain registers of currently v
17、alid International Standards. 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 po
18、sition for nuts. 3 Configuration 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 (type of attachment at the users disc
19、retion) to the nut at the maximum operating temperature. See test conditions specified in ISO5858. 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 temper
20、ature that the nut is able withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the surface treatment.BSA329:1999 2 BSI 04-1999 Table 1 NOTETolerances of form and position shall conform to thos
21、e specified in ISO8788. Details of form not stated are at the manufacturers option. 1) 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 m
22、anufacturing methods. 2) Tooling 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 S T V max. max. min. min. max. max. max. max. max. max. max. max. 0,25 030 MJ3 0,54H6H 6 6 4,6 6 17,7 3,2 2,5 2,5 1,6 4,8 040 MJ4 0,74H6H 6,6 8,5 8 4,4 2,2 6,2 8 23,7 5,8
23、1,1 11 13 3 2,9 050 MJ5 0,84H6H 0,4 8,1 9,5 5,5 2,4 7,3 9 25,2 6,9 11,4 13,4 3,5 060 MJ6 14H5H 9,2 11 6,5 2,7 8,7 10 27,7 8,1 1,3 12,7 14,7 3,5 4 080 MJ8 14H5H 0,5 12,8 8,5 8,5 10,9 13 29,7 9,9 1,7 15 18 3 5 5,7 100 MJ10 1,254H5H 15 13 10,5 3 12,9 16,2 34,3 12 1,9 20,2 22 4,5 3,5 6 6,6 a In accordan
24、ce with ISO5855-2. In self-locking zone, the tolerances apply before forming out-of-round. b Measured at sharp corners (chamfered) or points of tangency (radiused). c Maximum protrusion of the bolt.blankBS A329:1999 ISO3168:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution
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