1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD AEROSPACE SERIES BS 4A 22
2、8 : 1997 ICS 49.030.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Steel double hexagon bolts 1250 MPa (180,000 lbf/in 2 ) for aircraftBS 4A 228 : 1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was pu
3、blished under the authority of the Standards Board and comes into effect on 15 June 1997 BSI 1997 First published as BS A 228 Second edition BS 2A 228 : 1971 Third edition BS 3A 228 : January 1979 The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for
4、comment 96/709182 DC ISBN 0 580 27198 6 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the fol
5、lowing bodies were represented: British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd.BS 4A 228 : 1997 BSI 1997 i Contents Page Committees responsible Inside front cover Foreword ii Specification 1 Scope 1 2 Normative references 1 3 Materials, manufac
6、ture, inspection and testing 1 4 Screw threads 1 5 Dimensions 1 6 Anti-corrosion treatment 1 7 Identification and marking 1 Annex A (normative) Oversize bolts 11 Tables 1 Dimensions 3 2 Bearing length L and overall length E 5 A.1 Dimensions of oversize bolts 11 Figure 1 Dimensions 2 List of referenc
7、es Inside back coverii BSI 1997 BS 4A 228 : 1997 Foreword This British Standard has been prepared by Technical Committee ACE/12. It supersedes BS 3A 228 : 1979 which is withdrawn. This edition incorporates the requirements for 1 UNJF bolts and at the same time corrects several editorial errors that
8、have been noted in the previous edition. It does not reflect a full review or revision of the standard which will be undertaken in due course. Oversize dimensions for 10 32 and 1 diameter bolts have not been included. Compliance with a British Standard does not of itself confer immunity from legal o
9、bligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and a back cover. BSI 1997 1 BS 4A 228 : 1997 Specification 1 Scope This British Standard specifies the materials, dimensions, finish and inspection requirem
10、ents for steel bolts of high metallurgical quality with double hexagon head and unified screw threads of UNJF basic profile for aircraft use. NOTE. The latest edition of an Aerospace Series standard is indicated by a prefix number. 2 Normative references This British Standard incorporates, by dated
11、or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies, any subsequent amendments to or revisions of the c
12、ited publication apply to this standard only when incorporated by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 3 Materials, manufacture, inspection and testing 3.1 Materials The bolts shall be manufactured from stee
13、l bars conforming to the requirements of BS S 147 or BS S 149, according to the discretion of the manufacturer. 3.2 Manufacture, inspection and testing The bolts shall be manufactured, inspected and tested in accordance with the requirements of BS A 241. 4 Screw threads The screw threads shall confo
14、rm to the requirements of BS 4084. 5 Dimensions 5.1 All finished bolts, after the application of the cadmium coating shall conform to the dimensions and tolerances given in tables 1 and 2. See also figure 1. 5.2 The wrenching profile of the bolts shall conform to the dimensions and tolerances given
15、in SBAC publication RS 6801. 5.3 Oversize bolts are designated X and Y for the first and second oversize respectively. Dimensions for oversize bolts are given in annex A. 5.4 With reference to figure 1 and table 1, the following conditions shall apply. a) Dimensions A, B and G shall be concentric to
16、 each other within values specified for K. b) Dimensions W and G shall be concentric to each other within values specified for M. c) Dimensions A and the effective thread diameter shall be concentric to each other within values specified for N. d) Untoleranced linear dimensions shall be within 0.01
17、in and untoleranced angles shall be within 2. 6 Anti-corrosion treatment All finished bolts shall be coated with cadmium in accordance with DEF STAN 03-192. 7 Identification and marking The bolts shall be marked on the top face of the head with the number of this British Standard and the relevant Pa
18、rt number given in table 2 and annex A. The bolts shall be marked in accordance with the requirements of BS A 241. Examples of bolt marking Standard size A228E6 Standard size drilled head A228E6H First oversize A228E6X First oversize drilled head A228E6HX Second oversize A228E6Y Second oversize dril
19、led head A228E6HY2 BSI 1997 BS 4A 228 : 1997 Figure 1. Dimensions BSI 1997 3 BS 4A 228 : 1997 Table 1. Dimensions All dimensions are in inches 1 234567891 01 11 21 3 Nominal size and threads per in Decimal equiv. of nominal size A 23 TB C DrG diameter pitch in ref. diameter diameter min. dia. 20.030
20、 +0.010 max. min. max. min. max. min. 10 32 UNJF 0.1900 0.1895 0.1885 0.063 0.420 0.350 0.340 0.250 0.235 0.092 0.265 0.125 28 UNJF 1 4 0.2500 0.2495 0.2485 0.071 0.492 0.438 0.428 0.312 0.297 0.135 0.300 0.180 24 UNJF 5 16 0.3125 0.3120 0.3110 0.083 0.579 0.531 0.521 0.375 0.360 0.162 0.348 0.215 2
21、4 UNJF 3 8 0.3750 0.3745 0.3735 0.083 0.625 0.649 0.639 0.437 0.422 0.197 0.388 0.260 20 UNJF 7 16 0.4375 0.4370 0.4360 0.100 0.721 0.750 0.740 0.500 0.485 0.228 0.435 0.320 20 UNJF 1 2 0.5000 0.4995 0.4985 0.100 0.768 0.828 0.818 0.562 0.547 0.254 0.504 0.380 18 UNJF 9 16 0.5625 0.5615 0.5605 0.111
22、 0.852 0.938 0.928 0.625 0.610 0.287 0.557 0.440 18 UNJF 5 8 0.6250 0.6240 0.6230 0.111 0.899 1.050 1.040 0.687 0.672 0.327 0.618 0.500 16 UNJF 3 4 0.7500 0.7490 0.7480 0.125 1.036 1.230 1.220 0.812 0.797 0.380 0.711 0.570 14 UNJF 7 8 0.8750 0.8740 0.8730 0.143 1.244 1.438 1.428 0.937 0.922 0.438 0.
23、808 0.650 1 12 UNJF 1.0000 0.9990 0.9980 0.167 1.479 1.625 1.615 1.062 1.047 0.493 0.923 0.740 1 12 UNJF 1 8 1.1250 1.1240 1.1225 0.167 1.650 1.875 1.865 1.250 1.235 0.556 1.051 0.840 NOTE 1. Reference dimensions are for design purposes only and are not an inspection or manufacturing requirement. NO
24、TE 2. On bolts in or larger, centre drilling of shank is optional for manufacture. 3 44 BSI 1997 BS 4A 228 : 1997 Table 1. Dimensions (continued) All dimensions are in inches 1 1 41 51 61 71 81 92 02 12 22 32 4 Nominal size and threads per in HJPR SUW Concentricity (see 4.3) dia. 0.016 nominal max.
25、max. min. max. KMN 10 32 UNJF 0.055 0.041 0.031 0.031 0.2500 0.004 0.003 0.0045 28 UNJF 1 4 0.069 0.062 0.041 0.031 0.031 0.3125 0.005 0.004 0.0045 24 UNJF 5 16 0.082 0.041 0.031 0.047 0.3750 0.006 0.005 0.0045 24 UNJF 3 8 0.091 0.070 0.057 0.047 0.047 0.4375 0.008 0.006 0.0045 20 UNJF 7 16 0.099 0.
26、057 0.047 0.047 0.5000 0.009 0.008 0.006 20 UNJF 1 2 0.123 0.057 0.047 0.047 0.5625 0.010 0.008 0.006 18 UNJF 9 16 0.133 0.057 0.047 0.062 0.6250 0.011 0.009 0.006 0.094 18 UNJF 5 8 0.150 0.073 0.063 0.062 0.6875 0.012 0.010 0.006 16 UNJF 3 4 0.200 0.178 0.073 0.063 0.187 0.062 0.8125 0.015 0.012 0.
27、006 14 UNJF 7 8 0.260 0.198 0.073 0.063 0.187 0.078 0.9375 0.018 0.014 0.009 1 12 UNJF 0.260 0.222 0.125 0.073 0.063 0.250 0.078 1.0625 0.020 0.016 0.009 1 12 UNJF 1 8 0.320 0.258 0.073 0.063 0.250 0.094 1.2500 0.022 0.019 0.009 NOTE 1. Reference dimensions are for design purposes only and are not a
28、n inspection or manufacturing requirement. NOTE 2. On bolts in or larger, centre drilling of shank is optional for manufacture. 3 4 BSI 1997 5 BS 4A 228 : 1997 Table 2. Bearing length L and overall length E NOTE. Unallocated part numbers should not be used. All dimensions are in inches E L No. 10 32
29、 UNJF No. 10 32 UNJF in UNJF 1 4 in UNJF 1 4 Part no.LEPart no.LEPart no.LEPart no.LE 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 D 2 0.125 0.565 D46 2.875 3.315 E 2 0.125 0.637 E46 2.875 3.387 D 3 0.187 0.627 D48 3.000 3.440 E 3 0.187 0.699 E48 3.000 3.512 D 4 0.250 0.690 D50 3.125 3.565 E 4 0.
30、250 0.762 E50 3.125 3.637 D 5 0.312 0.752 D52 3.250 3.690 E 5 0.312 0.824 E52 3.250 3.762 D 6 0.375 0.815 D54 3.375 3.815 E 6 0.375 0.887 E54 3.375 3.887 D 7 0.438 0.878 D56 3.500 3.940 E 7 0.438 0.950 E56 3.500 4.012 D 8 0.500 0.940 D58 3.625 4.065 E 8 0.500 1.012 E58 3.625 4.137 D 9 0.562 1.002 D6
31、0 3.750 4.190 E 9 0.562 1.074 E60 3.750 4.262 D10 0.625 1.065 D62 3.875 4.315 E10 0.625 1.137 E62 3.875 4.387 D11 0.688 1.128 D64 4.000 4.440 E11 0.688 1.200 E64 4.000 4.512 D12 0.750 1.190 D66 4.125 4.565 E12 0.750 1.262 E66 4.125 4.637 D13 0.812 1.252 D68 4.250 4.690 E13 0.812 1.324 E68 4.250 4.76
32、2 D14 0.875 1.315 D70 4.375 4.815 E14 0.875 1.387 E70 4.375 4.887 D15 0.938 1.378 D72 4.500 4.940 E15 0.938 1.450 E72 4.500 5.012 D16 1.000 1.440 D74 4.625 5.065 E16 1.000 1.512 E74 4.625 5.137 D18 1.125 1.565 D76 4.750 5.190 E18 1.125 1.637 E76 4.750 5.262 D20 1.250 1.690 D78 4.875 5.315 E20 1.250
33、1.762 E78 4.875 5.387 D22 1.375 1.815 D80 5.000 5.440 E22 1.375 1.887 E80 5.000 5.512 D24 1.500 1.940 D82 5.125 5.565 E24 1.500 2.012 E82 5.125 5.637 D26 1.625 2.065 D84 5.250 5.690 E26 1.625 2.137 E84 5.250 5.762 D28 1.750 2.190 D86 5.375 5.815 E28 1.750 2.262 E86 5.375 5.887 D30 1.875 2.315 D88 5.
34、500 5.940 E30 1.875 2.387 E88 5.500 6.012 D32 2.000 2.440 D90 5.625 6.065 E32 2.000 2.512 E90 5.625 6.137 D34 2.125 2.565 D92 5.750 6.190 E34 2.125 2.637 E92 5.750 6.262 D36 2.250 2.690 D94 5.875 6.315 E36 2.250 2.762 E94 5.875 6.387 D38 2.375 2.815 D96 6.000 6.440 E38 2.375 2.887 E96 6.000 6.512 D4
35、0 2.500 2.940 E40 2.500 3.012 D42 2.625 3.065 E42 2.625 3.137 D44 2.750 3.190 E44 2.750 3.2626 BSI 1997 BS 4A 228 : 1997 Table 2. Bearing length L and overall length E (continued) in UNJF 5 16 in UNJF 3 8 in UNJF 7 16 in UNJF 1 2 Part no.LEPart no.LEPart no.LEPart no.LE 0.010 0.010 0.010 0.010 0.010
36、 0.010 0.010 0.010 G 2 0.125 0.724 G 3 0.187 0.786 G 4 0.250 0.849 J 4 0.250 0.895 L 4 0.250 0.991 N 4 0.250 1.038 G 5 0.312 0.911 J 5 0.312 0.957 L 5 0.312 1.053 N 5 0.312 1.100 G 6 0.375 0.974 J 6 0.375 1.020 L 6 0.375 1.116 N 6 0.375 1.163 G 7 0.438 1.037 J 7 0.438 1.083 L 7 0.438 1.179 N 7 0.438
37、 1.226 G 8 0.500 1.099 J 8 0.500 1.145 L 8 0.500 1.241 N 8 0.500 1.288 G 9 0.562 1.161 J 9 0.562 1.207 L 9 0.562 1.303 N 9 0.562 1.350 G10 0.625 1.224 J10 0.625 1.270 L10 0.625 1.366 N10 0.625 1.413 G11 0.688 1.287 J11 0.688 1.333 L11 0.688 1.429 N11 0.688 1.476 G12 0.750 1.349 J12 0.750 1.395 L12 0
38、.750 1.491 N12 0.750 1.538 G13 0.812 1.411 J13 0.812 1.457 L13 0.812 1.553 N13 0.812 1.600 G14 0.875 1.474 J14 0.875 1.520 L14 0.875 1.616 N14 0.875 1.663 G15 0.938 1.507 J15 0.938 1.583 L15 0.938 1.679 N15 0.938 1.726 G16 1.000 1.599 J16 1.000 1.645 L16 1.000 1.741 N16 1.000 1.788 G18 1.125 1.724 J
39、18 1.125 1.770 L18 1.125 1.866 N18 1.125 1.913 G20 1.250 1.849 J20 1.250 1.895 L20 1.250 1.991 N20 1.250 2.038 G22 1.375 1.974 J22 1.375 2.020 L22 1.375 2.116 N22 1.375 2.163 G24 1.500 2.099 J24 1.500 2.145 L24 1.500 2.241 N24 1.500 2.288 G26 1.625 2.224 J26 1.625 2.270 L26 1.625 2.366 N26 1.625 2.4
40、13 G28 1.750 2.349 J28 1.750 2.395 L28 1.750 2.491 N28 1.750 2.538 G30 1.875 2.474 J30 1.875 2.520 L30 1.875 2.616 N30 1.875 2.663 G32 2.000 2.599 J32 2.000 2.645 L32 2.000 2.741 N32 2.000 2.788 G34 2.125 2.724 J34 2.125 2.770 L34 2.125 2.866 N34 2.125 2.913 G36 2.250 2.849 J36 2.250 2.895 L36 2.250
41、 2.991 N36 2.250 3.038 G38 2.375 2.974 J38 2.375 3.020 L38 2.375 3.110 N38 2.375 3.163 G40 2.500 3.099 J40 2.500 3.145 L40 2.500 3.241 N40 2.500 3.288 G42 2.625 3.224 J42 2.625 3.270 L42 2.625 3.366 N42 2.625 3.413 G44 2.750 3.349 J44 2.750 3.395 L44 2.750 3.491 N44 2.750 3.538 G46 2.875 3.474 J46 2
42、.875 3.520 L46 2.875 3.616 N46 2.875 3.663 G48 3.000 3.599 J48 3.000 3.645 L48 3.000 3.741 N48 3.000 3.788 G50 3.125 3.724 J50 3.125 3.770 L50 3.125 3.866 N50 3.125 3.913 G52 3.250 3.849 J52 3.250 3.895 L52 3.250 3.991 N52 3.250 4.038 G54 3.375 3.974 J54 3.375 4.020 L54 3.375 4.116 N54 3.375 4.163 B
43、SI 1997 7 BS 4A 228 : 1997 Table 2. Bearing length L and overall length E (continued) in UNJF 5 16 in UNJF 3 8 in UNJF 7 16 in UNJF 1 2 Part no.LEPart no.LEPart no.LEPart no.LE 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 G56 3.500 4.099 J56 3.500 4.145 L56 3.500 4.241 N56 3.500 4.288 G58 3.625 4
44、.224 J58 3.625 4.270 L58 3.625 4.366 N58 3.625 4.413 G60 3.750 4.349 J60 3.750 4.395 L60 3.750 4.491 N60 3.750 4.538 G62 3.875 4.474 J62 3.875 4.520 L62 3.875 4.616 N62 3.875 4.663 G64 4.000 4.599 J64 4.000 4.645 L64 4.000 4.741 N64 4.000 4.788 G66 4.125 4.724 J66 4.125 4.770 L66 4.125 4.866 N66 4.1
45、25 4.913 G68 4.250 4.849 J68 4.250 4.895 L68 4.250 4.991 N68 4.250 5.038 G70 4.375 4.974 J70 4.375 5.020 L70 4.375 5.116 N70 4.375 5.163 G72 4.500 5.099 J72 4.500 5.145 L72 4.500 5.241 N72 4.500 5.288 G74 4.625 5.224 J74 4.625 5.270 L74 4.625 5.366 N74 4.625 5.413 G76 4.750 5.349 J76 4.750 5.395 L76
46、 4.750 5.491 N76 4.750 5.538 G78 4.875 5.474 J78 4.875 5.520 L78 4.875 5.616 N78 4.875 5.663 G80 5.000 5.599 J80 5.000 5.645 L80 5.000 5.741 N80 5.000 5.788 G82 5.125 5.724 J82 5.125 5.770 L82 5.125 5.866 N82 5.125 5.913 G84 5.250 5.849 J84 5.250 5.895 L84 5.250 5.991 N84 5.250 6.038 G86 5.375 5.974
47、 J86 5.375 6.020 L86 5.375 6.116 N86 5.375 6.163 G88 5.500 6.099 J88 5.500 6.145 L88 5.500 6.241 N88 5.500 6.288 G90 5.625 6.224 J90 5.625 6.270 L90 5.625 6.366 N90 5.625 6.413 G92 5.750 6.349 J92 5.750 6.395 L92 5.750 6.491 N92 5.750 6.538 G94 5.875 6.474 J94 5.875 6.520 L94 5.875 6.616 N94 5.875 6
48、.663 G96 6.000 6.599 J96 6.000 6.645 L96 6.000 6.741 N96 6.000 6.7888 BSI 1997 BS 4A 228 : 1997 Table 2. Bearing length L and overall length E (continued) in UNJF 9 16 in UNJF 5 8 in UNJF 3 4 in UNJF 7 8 Part no.LEPart no.LEPart no.LEPart no.LE 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 P 6 0.3
49、75 1.247 Q 6 0.375 1.294 S 6 0.375 1.431 P 7 0.438 1.310 Q 7 0.438 1.357 S 7 0.438 1.494 P 8 0.500 1.372 Q 8 0.500 1.419 S 8 0.500 1.556 U 8 0.500 1.764 P 9 0.562 1.434 Q 9 0.562 1.481 S 9 0.562 1.618 U 9 0.562 1.826 P10 0.625 1.497 Q10 0.625 1.544 S10 0.625 1.681 U10 0.625 1.889 P11 0.688 1.560 Q11 0.688 1.607 S11 0.688 1.744 U11 0.688 1.952 P12 0.750 1.622 Q12 0.750 1.669 S12 0.750 1.806 U12 0.750 2.014
