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1、BRITISH STANDARD BS A 304:1994 ISO 3203:1993 Bolts, normal bihexagonal head, normal or pitch diameter shank, long length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1100 MPa Dimensions Licensed Copy: London South Bank University, London South Bank Univer
2、sity, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 304:1994 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 August 1994 BSI 01-2000
3、 The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for comment 90/78994 DC ISBN 0 580 23218 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) t
4、o Technical Committee ACE/12, upon which the following bodies were represented: The Association of Electronics, Telecommunications and Business Equipment Industries British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publica
5、tion Amd. No.DateComments 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 304:1994 BSI 01-2000i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Co
6、nfiguration and dimensions1 Figure 11 Table 12 List of referencesInside 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 304:1994 ii BSI 01-2000 National foreword This British Standard has been p
7、repared under the direction of the Aerospace Standards Policy Committee. It is identical with ISO 3203:1993 Aerospace Bolts, normal bihexagonal head, normal or pitch diameter shank, long length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa Dimens
8、ions, published by the International Organization for Standardization (ISO). The Technical Committee has reviewed the provisions of ISO 4095:1978, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard
9、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. Cross-references International StandardCorresponding British
10、 Standard ISO 286-2:1988BS EN 20286 ISO system of limits and fits Part 2:1992 Tables of standard tolerance grades and limit deviations for holes and shafts (Identical) ISO 3353:1992BS 2A 231:1993 Rolled threads for bolts. Lead and runout requirements. (Identical) ISO 5855-2:1988BS 6293 Aerospace MJ
11、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, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments inc
12、orporated. 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 BS A 304:1994 BSI 01-20001 1 Scope This International Standard specifies the d
13、imensions of normal bihexagonal head bolts, with normal or pitch diameter shank, and long length MJ threads, in metallic material, coated or uncoated, with strength classes less than or equal to 1 100 MPa. It is intended for the drawing up of aerospace product standards. 2 Normative references The f
14、ollowing standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are
15、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 valid International Standards. ISO 286-2:1988, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit d
16、eviations for holes and shafts. ISO 3353:1992, Aerospace Rolled threads for bolts Lead and runout requirements. ISO 4095:1978, Fasteners for aerospace construction Bi-hexagonal wrenching configuration. ISO 5855-2:1988, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts. 3 Configuration
17、 and dimensions See Figure 1 and Table 1. Dimensions and tolerances are expressed in millimetres. They are applicable after any surface coating, but before the application of any lubricant. Figure 1 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00
18、:00 2006, Uncontrolled Copy, (c) BSI BS A 304:1994 2 BSI 01-2000 Table 1 Diameter code Threada D1 D2D3D4D5D6D7 normalpitch diameter nom.tol.nom.tol.nom.tol.min.min.max.H13b 040MJ4 0,7 4h6h4 h12b 3,54 0,13 35,87,58,3 1 050MJ5 0,8 4h6h54,483,23,4 0,5 6,88,39,1 060MJ6 1 4h6h65,354,14,27,89,8 10,6 1,407
19、0MJ7 1 4h6h76,354,95,28,811,3 12,1 080MJ8 1 4h6h87,355,26,29,812,8 13,6 100MJ10 1,25 4h6h 109,196,77,911,815,7 16,7 1,6 120MJ12 1,25 4h6h 1211,1989,813,718,8 19,9 Diameter code HKL1cdeL2cdeL3L4ePR1STWrenching dash numberf min.h15bmin.max.nom.tol.nom.tol.min. 0400,85,50,421416 to 56 0,3 3,50,42,506 0
20、5016,50,5 4 1620 to 704,50,52,52,807 0601,27,5 0,7 1822 to 845,2 0,7 2,83,508 0701,48,22024 to 985,93,33,809 0801,68,62226 to 1126,33,73,910 100210,10,8 6 2632 to 1407,70,84,74,212 1202,411,40,93036 to 1688,80,95,64,514 a In conformity with ISO 5855-2. b See ISO 286-2. c First length, corresponding
21、to first L 4 length. d Conditions L 1min. and L2max. cannot be obtained simultaneously. e Increments: 2 for L4u 100 4 for L4 100 If greater lengths are required, they shall be chosen using these increments. f In conformity with ISO 4095 over T min. +0,5 0 0 0,5 +0,4 0 0 0,2 0 0,3 Licensed Copy: Lond
22、on South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 304:1994 BSI 01-2000 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, Un
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31、 does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:33:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
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