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1、BRITISH STANDARD AEROSPACE SERIES BS A 314:1997 ISO 9609:1996 Aerospace Nuts, hexagonal, plain, reduced height, normal across flats, with MJ threads, classifications: 450 MPa (at ambient temperature)/120 C, 450 MPa (at ambient temperature)/235 C, 600 MPa (at ambient temperature)/425 C, 900 MPa (at a
2、mbient temperature)/235 C, 900 MPa (at ambient temperature)/315 C, 900 MPa (at ambient temperature)/650 C, 1100 MPa (at ambient temperature)/235 C, 1100 MPa (at ambient temperature)/730 C and 1250 MPa (at ambient temperature)/ 600 C Dimensions ICS 49.030.30 Licensed Copy: London South Bank Universit
3、y, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 314:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1
4、997 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for comment 88/77414 DC ISBN 0 580 26692 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospa
5、ce fasteners and fastening systems, upon which the following bodies were represented: British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South
6、Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 314:1997 BSI 03-2000i Contents Page Committees responsibleInside front cover National forewordii Forewordii 0Introduction1 1Scope1 2Normative references1 3Configuration and dimensions1 Figure 12 Table 12 List of ref
7、erencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 314:1997 ii BSI 03-2000 National foreword This British Standard has been prepared by Technical Committee ACE/12. It is identical wit
8、h ISO 9609:1996, Aerospace Nuts, hexagonal, plain, reduced height, normal across flats, with MJ threads, classifications: 450 MPa (at ambient temperature)/120 C, 450 MPa (at ambient temperature)/235 C, 600 MPa (at ambient temperature)/425 C, 900 MPa (at ambient temperature)/235 C, 900 MPa (at ambien
9、t temperature)/315 C, 900 MPa (at ambient temperature)/650 C, 1 100 MPa (at ambient temperature)/235 C, 1 100 MPa (at ambient temperature)/730 C and 1 250 MPa (at ambient temperature)/600 C Dimensions, published by the International Organization for Standardization (ISO). A British Standard does not
10、 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. Cross-reference International StandardCorresponding British Standard
11、 ISO 5855-2:1988BS 6293 Aerospace MJ threads Part 2:1994 Limit dimensions for bolts and nuts (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, page ii, pages 1 and 2, an inside back cover and a back cover. This standard has
12、 been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Cop
13、y: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 314:1997 ii BSI 03-2000 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
14、 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 and non-gove
15、rnmental, 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 circulated to the member bodies for v
16、oting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 9609 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener systems. Descriptors: Aircraft ind
17、ustry, fasteners, MJ threads, nuts (fasteners), hexagonal nuts, classification, dimensions. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 314:1997 BSI 03-20001 0 Introduction The dimensions specified in
18、this International Standard have been determined to satisfy the requirements of the procurement specification which will be the subject of a future International Standard. 1 Scope This International Standard specifies the dimensions of plain, hexagonal nuts, reduced height, normal across flats, with
19、 MJ threads, of classifications: 450 MPa1)/120 C 2), 450 MPa1)/235 C 2), 600 MPa1)/425 C 2), 900 MPa1)/235 C 2), 900 MPa1)/315 C 2), 900 MPa 2)/650 C 2), 1 100 MPa1)/235 C 2), 1 100 MPa1)/730 C 2), and 1 250 MPa1)/600 C2). Nuts provided with holes are intended to be used with lockwire in conformity
20、with ISO 245. 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,
21、the 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 c
22、urrently valid International Standards. ISO 245:1986, Aircraft Lockwire. ISO 5855-2:1988, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts. ISO 8788:1987, Aerospace Fasteners Tolerances of form and position for nuts. 3 Configuration and dimensions See Figure 1 and Table 1. Dimensions
23、 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 ambient temperature without breaking or cracking when tested with a bolt of a higher s
24、trength 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 by the material or by the surface treatment. Licensed Copy: London South Bank Uni
25、versity, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 314:1997 2 BSI 03-2000 Table 1 NOTETolerances of form and position shall conform to those specified in ISO 8788. 1)These values, in micrometers, apply before any surface coating(s) is(are) appl
26、ied. The values do not apply to threads the surface texture of which will be as achieved by the usual manufacturing methods. 2)All forms of entry (chamfer or radius) permissible within these limiting dimensions. 3)Form of contour, within limiting dimensions, is left to the manufacturers discretion.
27、Diameter M may be tangential to, but shall not intrude on the flats. 4)Applicable to both faces 5)From either face Figure 1 Diameter code Threada EFHLMNUVW Lockwire diameterb min.h14min.H13 0,2min. 040MJ4 0,7 4H6H7,67 h12 2,64,26,4 050MJ5 0,8 4H6H8,7835,27,4 050MJ6 1 4H5H10,9103,56,39,30,53,9 1,4 07
28、0MJ7 1 4H5H121147,310,214,4 1,6 0,8 080MJ8 1 4H5H14,3138,312,25 100MJ10 1,25 4H5H 18,917510,3166,9 2,1 120MJ12 1,25 4H5H 21,119612,31882,6 140MJ14 1,5 4H5H24,522h13714,4219,6 3,1 160MJ16 1,5 4H5H26,824816,4230,61,510,7 3,61,25 180MJ18 1,5 4H5H30,227918,426124,1 200MJ20 1,5 4H5H33,6301020,42913,4 4,6
29、 220MJ22 1,5 4H5H35,8321122,430,914,4 5 240MJ24 2 4H5H40,4361224,534,916,1 5,5 a In accordance with ISO 5855-2 b For information, in conformity with ISO 245 0 0 3, +0,6 0 +0,8 0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolle
30、d Copy, (c) BSI BS A 314:1997 BSI 03-2000 List of references See national foreword. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 314:1997 ISO 9609:1996 BSI 389 Chiswick High Road London W4 4AL BSI Briti
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