BS A 318-1997 Nuts hexagonal slotted (castellated) reduced height reduced across flats with MJ threads classifications - 450 MPa (at ambient temperature) 425 C 600 MPa (at ambient .pdf

1、BRITISH STANDARD AEROSPACE SERIES BS A 318:1997 ISO 10096:1997 Aerospace Nuts, hexagonal, slotted (castellated), reduced height, reduced across flats, with MJ threads, classifications: 450 MPa (at ambient temperature)/425 C, 600MPa (at ambient temperature)/235 C, 600 MPa (at ambient temperature)/315

2、 C, 600MPa (at ambient temperature)/650 C, 900 MPa (at ambient temperature)/235 C, 900MPa (at ambient temperature)/730 C and 1 100 MPa (at ambient temperature)/600 C Dimensions ICS 49.030.30BSA318:1997 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was

3、 published underthe authority of the Standards Board and comesintoeffect on 15November1997 BSI 04-2000 ISBN 0 580 28787 4 National foreword This British Standard reproduces verbatim ISO10096:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted by

4、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 understand the text; present to the responsible international/European committee any enquiries

5、 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 this subcommittee can be obtained on request to its secretary. Cross-references The Briti

6、sh 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 Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British

7、 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 confer immunity from legal obligations. Summary of pages This document comprises a front c

8、over, an inside front cover, pages i and ii, theISO title page, pages ii to iv, pages 1 and 2 and abackcover. 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

9、 publication Amd. No. Date CommentsBSA318:1997 BSI 04-2000 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 10096 1ii blankBSA318:1997 ii BSI 04-2000 Contents Page Foreword iii Introduction 1 1 Scope 1 2 Normative references 1 3 Configuration and dimensions 1 Figure 1 2

10、Table 1 2 Descriptors: Aircraft industry, fasteners, MJ threads, nuts (fasteners), hexagonal nuts, castle nuts, classification, form specifications, dimensions.BSA318:1997 BSI 04-2000 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standard

11、s 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 been established has the right to be represented on that committee. International organiz

12、ations, 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 standardization. Draft International Standards adopted by the technical committees are circ

13、ulated 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 ISO10096 was prepared by Technical Committee ISO/TC20, Aircraft and space vehicles, Subcommittee SC4, Aerospace fastener syste

14、ms.iv blankBSA318:1997 BSI 04-2000 1 Introduction The dimensions specified in this International Standard have been determined to satisfy the requirements of the procurement specification of ISO9139. 1 Scope This International Standard specifies the dimensions of hexagon slotted (castellated) nuts,

15、reduced height, reduced across flats, with MJ threads, of classifications: 450MPa 1) /425 C 2) , 600MPa 1) /235 C 2) , 600MPa 1) /315 C 2) , 600 MPa 1) /650 C 2) , 900 MPa 1) /235 C 2) , 900 MPa 1) /730 C 2)and1100 MPa 1) /600 C 2) . These nuts are intended to be used with split pins in conformity w

16、ith ISO1234. 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, t

17、he editions 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 cu

18、rrently valid International Standards. ISO 1234:, Split pins 3) . ISO 5855-2:1988, Aerospace MJ threads Part2: Limit dimensions for bolts and nuts. ISO 8788:1987, Aerospace Fasteners Tolerances of form and position for nuts. ISO 9139:, Aerospace Nuts, plain or slotted (castellated) Procurement speci

19、fication 4) . 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. 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambie

20、nt temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned

21、by the material or by the surface treatment. 3) To be published. (Revision of ISO 1234:1976) 4) To be published.BSA318:1997 2 BSI 04-2000 Table 1 NOTETolerances of form and position shall conform to those specified in ISO8788. Details of form not stated are at the manufacturers discretion. 1) These

22、values, in micrometres, apply before any surface coating(s) is (are) applied. The values do not apply to threads the surface texture of which will be as achieved by the usual manufacturing methods. 2) Applies to: height below slots; height of flats. 3) This dimension also applies to the upper chamfe

23、r. All forms of entry (chamfer or radius) permissible within these limiting dimensions. 4) Diameter M may be tangential to, but shall not intrude on the flats. Figure 1 Diameter code Thread a E F G H J L M N S Maximum split pin diameter b min. h13 h14 0,25 0,25 min. H14 100 MJ101,25 4H5H 15,5 14 4 7

24、,6 12,5 10,3 13,2 0,6 2,6 2,3 120 MJ121,25 4H5H 18,9 17 4,8 8,4 14,5 12,3 16 140 MJ141,5 4H5H 21,1 19 5,6 10 17 14,4 18 3,2 2,9 160 MJ161,5 4H5H 24,5 22 6,4 10,8 19 16,4 21 180 MJ181,5 4H5H 26,8 24 7,2 12,4 22 18,4 23 4 3,7 200 MJ201,5 4H5H 30,2 27 8 13,2 24 20,4 26 220 MJ221,5 4H5H 33,6 30 8,8 14 2

25、7 22,4 29 240 MJ242 4H5H 35,8 32 9,6 15,3 30 24,5 30,9 a In accordance with ISO 5855-2 b For information, in conformity with ISO1234 for the split pin maximum diameter but not for the split pin maximum diameter/thread diameter combination +0,8 0 0 0,3blankBS A 318:1997 ISO 10096:1997 BSI 389 Chiswic

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