1、BRITISH STANDARD AEROSPACE SERIES BS2A 229:1972 Incorporating Amendment Nos.1,2 and3 Specification for Hexagonal head steel bolts1100MPa UDC 629.7:621.882.211:669.14BS2A229:1972 This BritishStandard, having been approved by the AerospaceIndustry Standards Committee and endorsed by theChairman of the
2、 Engineering Divisional Council, was publishedunder the authority ofthe General Council of theInstitution on 12September1972 BSI02-2000 The following BSI reference relates to the work on this standard: Committee reference ACE/12 Draft for approval 71/35453 ISBN 0 580 07085 9 Amendments issued since
3、publication Amd. No. Date of issue Comments 2129 October1976 2814 April1979 6142 December 1990 Indicated by a sideline in the marginBS2A229:1972 BSI 02-2000 i Contents Page 1 Scope 1 2 General requirement 1 3 Material and manufacture 1 4 Dimensions 1 5 Screw threads 1 6 Anti-corrosion treatment 1 7
4、Identification and marking 1 Appendix A Oversize bolts Inside back cover Appendix B Table for the conversion of inches to millimetre equivalents Inside back cover Figure 1 2 Figure 2 2 Figure 3 3 Figure 4 3 Table 2 Bearing length L and overall length E 3BS2A229:1972 ii BSI 02-2000 This revision of B
5、S A229:1968 has been prepared to incorporate Amendment Slip No.1:1969 (AMD195,) and also to extend the size range to include 9 / 16 18 to1 1 / 4 12 UNJF bolts. Dimensions for oversize bolts are given in Appendix A. It provides a range of1100MPa to1250MPa steel bolts with UNJ profile threads and clos
6、e tolerance shanks for aircraft use. The lengths of the bolts are in fractional increments. This standard requires reference to the following BritishStandards: BS4084, Unified screw threads of “UNJ” basic profile. BSA100, General requirements for bolts and nuts of tensile strength not exceeding1250M
7、Pa. BS S147, Nickel-chromium-molybdenum steel (bar for the manufacture of forged bolts only). BS S148, Low nickel-chromium steel (bar for the manufacture of forged bolts only). BS S149, 1.75per cent nickel-chromium-molybdenum steel. BS S ., 1% chromium-molybdenum steel bars for the manufacture of fo
8、rged bolts and forged nuts 1) . NOTE 1The values in imperial units are to be regarded as the standard. The table in Appendix A provides millimetre equivalents of inch dimensions and is based on the tables in BS350, “Conversion factors and tables”. NOTE 21MPa=1N/mm 2 =1MN/m 2 =145.0lbf/in 2 . Informa
9、tion on SI units is given in BS3763, “The International System of units (SI)”. 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 Standard does not of itself co
10、nfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated
11、in the amendment table on the inside front cover. 1) In course of preparation.BS2A229:1972 BSI 02-2000 1 1 Scope This BritishStandard specifies the materials, dimensions, finish and inspection requirements for cadmium plated steel bolts with hexagonal heads and Unified threads for aircraft use. 2 Ge
12、neral requirement The bolts shall be manufactured, inspected and tested in accordance with the requirements of BSA100. 3 Material and manufacture 3.1 The bolts shall be forged from material which complies with the latest issue of one of the following BritishStandards: BS S147 or BS S148 or BS S149 o
13、r BS S . 2) . 3.2 In the finally heat-treated condition, the mechanical properties of the material used for forged bolts shall be as follows: 4 Dimensions 4.1 All bolts, after application of the ant-corrosion coating, shall conform to the dimensions and tolerances given in Table1 and Table 2 or Appe
14、ndix A. 4.2 The run-out of the thread shall comply with the relevant requirements of BS A100. 4.3 The nominal length of the bolt shall be the bearing length L. 4.4 Dimensions of oversize bolts are given in Appendix A. 5 Screw threads The screw threads shall conform to the basic thread form, diameter
15、 and related pitches specified in BS4084, “Unified screw threads of “UNJ” basic profile (Class3A)”. 6 Anti-corrosion treatment All bolts shall be coated with cadmium, in accordance with the relevant requirements of BSA100. 7 Identification and marking The bolts shall be marked on the top face of the
16、 head with the number of this BritishStandard and the relevant part numbers shown in Table 2, e.g.2A229E62. Oversize bolts shall be marked as state in Appendix A. 2) In course of preparation. 0.2% proof stress not less than965MPa Tensile strength not less than1100MPa Elongation on 5.65 S 0 not less
17、than10%BS 2A 229:1972 2 BSI 02-2000 NOTEIt is permissible to suitable chamfer the blank prior to thread rolling operation without any subsequent machining provided dia G and the max. runout of thread at bolt end are maintained. *For bearing length L and overall length E see Table 2 Figure 1 Figure 2
18、 Alternative form of bolt head at the option of the bolt manufacturer Third angle projection 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Nominal size UNJF Decimal equivalent of nominal size Diameter of plain portion of shank A 2 pitch T min. (reference only) Width across flats B Width across corners C Thick
19、ness of head D Radius under bolt head R Diameter of chamfer G Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. 0.010 in in in in in in in in in in in in in in 1032 0.1900 0.1895 0.1885 .063 0.381 0.376 0.367 0.434 0.419 0.125 0.110 0.025 0.015 0.120 1 / 4 28 0.2500 0.2495 0.2485 .071 0.443 0.439 0.
20、430 0.507 0.491 0.140 0.125 0.025 0.015 0.174 5 / 16 24 0.3125 0.3120 0.3110 .083 0.506 0.502 0.492 0.580 0.561 0.171 0.156 0.025 0.015 0.229 3 / 8 24 0.3750 0.3745 0.3735 .083 0.615 0.564 0.553 0.651 0.631 0.203 0.188 0.025 0.015 0.292 7 / 16 20 0.4375 0.4370 0.4360 .100 0.631 0.690 0.679 0.797 0.7
21、75 0.234 0.219 0.030 0.020 0.344 1 / 2 20 0.5000 0.4995 0.4985 .100 0.757 0.752 0.741 0.868 0.845 0.265 0.250 0.030 0.020 0.406 9 / 16 18 0.5625 0.5615 0.5605 0.111 0.859 0.877 0.865 1.001 0.987 0.296 0.281 0.035 0.020 0.462 5 / 8 18 0.6250 0.6240 0.6230 0.111 0.921 0.940 0.928 1.073 1.059 0.327 0.3
22、12 0.040 0.025 0.524 3 / 4 16 0.7500 0.7490 0.7480 0.125 1.057 1.064 1.052 1.214 1.200 0.390 0.375 0.045 0.030 0.640 7 / 8 14 0.8750 0.8740 0.8730 0.143 1.195 1.252 1.239 1.429 1.414 0.453 0.438 0.050 0.035 0.754 112 1.0000 0.9990 0.9980 0.167 1.314 1.440 1.427 1.643 1.628 0.515 0.500 0.060 0.045 0.
23、865 1 1 / 8 12 1.1250 1.1240 1.1225 0.167 1.463 1.627 1.614 1.856 1.842 0.577 0.562 0.070 0.055 0.990 1 1 / 4 12 1.250 1.2490 1.2475 0.167 1.651 1.814 1.801 2.071 2.055 0.640 0.625 0.075 0.060 1.114BS2A229:1972 BSI 02-2000 3 Table 2 Bearing length L and overall length E NOTEUnallocated part numbers
24、should not be used. Figure 3 Figure 4 No.1032 UNJF 1 / 4 28 UNJF 5 / 16 24 UNJF Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 in 0.125 0.188 0.250 0.312 0.375
25、0.438 0.500 0.562 0.625 0.688 0.750 0.812 0.875 0.938 1.000 1.062 1.125 1.188 1.250 1.312 1.375 1.438 1.500 1.562 1.625 1.688 1.750 1.812 1.875 1.938 in 0.531 0.594 0.656 0.718 0.781 0.844 0.906 0.968 1.031 1.094 1.156 1.218 1.281 1.344 1.406 1.468 1.531 1.594 1.656 1.718 1.781 1.844 1.906 1.968 2.0
26、31 2.094 2.156 2.218 2.281 2.344 E3 E4 E5 E6 E7 E8 E9 E10 E11 E12 E13 E14 E15 E16 E17 E18 E19 E20 E21 E22 E23 E24 E25 E26 E27 E28 E29 E30 E31 in 0.188 0.250 0.312 0.375 0.438 0.500 0.562 0.625 0.688 0.750 0.812 0.875 0.938 1.000 1.062 1.125 1.188 1.250 1.312 1.375 1.438 1.500 1.562 1.625 1.688 1.750
27、 1.812 1.875 1.938 in 0.656 0.718 0.780 0.843 0.906 0.968 1.030 1.093 1.156 1.218 1.280 1.343 1.406 1.468 1.530 1.593 1.656 1.718 1.780 1.843 1.906 1.968 2.030 2.093 2.156 2.218 2.280 2.343 2.406 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 G14 G15 G16 G17 G18 G19 G20 G21 G22 G23 G24 G25 G26 G27 G28 G29 G30
28、 G31 in 0.188 0.250 0.312 0.375 0.438 0.500 0.562 0.625 0.688 0.750 0.812 0.875 0.938 1.000 1.062 1.125 1.188 1.250 1.312 1.375 1.438 1.500 1.562 1.625 1.688 1.750 1.812 1.875 1.938 in 0.719 0.781 0.843 0.906 0.969 1.031 1.093 1.156 1.219 1.281 1.343 1.406 1.469 1.531 1.593 1.656 1.719 1.781 1.843 1
29、.906 1.969 2.031 2.093 2.156 2.219 2.281 2.343 2.406 2.469BS2A229:1972 4 BSI 02-2000Table 2 Bearing length L and overall length E No.1032 UNJF 1 / 4 28 UNJF 5 / 16 24 UNJF Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015 D32 D34 D36 D38 D40 D42 D44 D46 D48 D50 D52 D54 D56 D
30、58 D60 D62 D64 D66 D68 D70 D72 D74 D76 D78 D80 D82 D84 D86 D88 D90 D92 D94 D96 in 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.875 5.000 5.125 5.250 5.375 5.500 5.625 5.750 5.875 6.000 in 2.406 2.531 2.656
31、 2.781 2.906 3.031 3.156 3.281 3.406 3.531 3.656 3.781 3.906 4.031 4.156 4.281 4.406 4.531 4.656 4.781 4.906 5.031 5.156 5.281 5.406 5.531 5.656 5.781 5.906 6.031 6.156 6.281 6.406 E32 E34 E36 E38 E40 E42 E44 E46 E48 E50 E52 E54 E56 E58 E60 E62 E64 E66 E68 E70 E72 E74 E76 E78 E80 E82 E84 E86 E88 E90
32、 E92 E94 E96 in 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.875 5.000 5.125 5.250 5.375 5.500 5.625 5.750 5.875 6.000 in 2.468 2.593 2.718 2.843 2.968 3.093 3.218 3.343 3.468 3.593 3.718 3.843 3.968 4.093
33、 4.218 4.343 4.468 4.593 4.718 4.843 4.968 5.093 5.218 5.343 5.468 5.593 5.718 5.843 5.968 6.093 6.218 6.343 6.468 G32 G34 G36 G38 G40 G42 G44 G46 G48 G50 G52 G54 G56 G58 G60 G62 G64 G66 G68 G70 G72 G74 G76 G78 G80 G82 G84 G86 G88 G90 G92 G94 G96 in 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.
34、000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.875 5.000 5.125 5.250 5.375 5.500 5.625 5.750 5.875 6.000 in 2.531 2.656 2.781 2.906 3.031 3.156 3.281 3.406 3.531 3.656 3.781 3.906 4.031 4.156 4.281 4.406 4.531 4.656 4.781 4.906 5.031 5.156 5.281 5.406 5.531
35、 5.656 5.781 5.906 6.031 6.156 6.281 6.406 6.531BS2A229:1972 BSI 02-2000 5Table 2 Bearing length L and overall length E NOTEUnallocated part numbers should not be used. Figure 3 Figure 4 3 / 8 24 UNJF 7 / 16 20 UNJF 1 / 2 20 UNJF Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015 Part No. L 0.010 E 0
36、.015 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J15 J16 J17 J18 J19 J20 J21 J22 J23 J24 J25 J26 J27 J28 J29 J30 J31 in 0.250 0.312 0.375 0.438 0.500 0.562 0.625 0.688 0.750 0.812 0.875 0.938 1.000 1.062 1.125 1.188 1.250 1.312 1.375 1.438 1.500 1.562 1.625 1.688 1.750 1.812 1.875 1.938 in 0.891 0.954 1.0
37、16 1.079 1.141 1.203 1.266 1.329 1.391 1.453 1.516 1.579 1.641 1.703 1.766 1.829 1.891 1.953 2.016 2.079 2.141 2.203 2.266 2.329 2.391 2.453 2.516 2.579 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26 L27 L28 L29 L30 L31 in 0.250 0.312 0.375 0.438 0.500 0.562 0.
38、625 0.688 0.750 0.812 0.875 0.938 1.000 1.062 1.125 1.188 1.250 1.312 1.375 1.438 1.500 1.562 1.625 1.688 1.750 1.812 1.875 1.938 in 0.906 0.968 1.031 1.094 1.156 1.218 1.281 1.344 1.406 1.468 1.531 1.594 1.656 1.718 1.781 1.844 1.906 1.968 2.031 2.094 2.156 2.218 2.281 2.344 2.406 2.468 2.531 2.594
39、 N5 N6 N7 N8 N9 N10 N11 N12 N13 N14 N15 N16 N17 N18 N19 N20 N21 N22 N23 N24 N25 N26 N27 N28 N29 N30 N31 in 0.312 0.375 0.438 0.500 0.562 0.625 0.688 0.750 0.812 0.875 0.938 1.000 1.062 1.125 1.188 1.250 1.312 1.375 1.438 1.500 1.562 1.625 1.688 1.750 1.812 1.875 1.938 in 1.094 1.157 1.220 1.282 1.33
40、4 1.407 1.470 1.532 1.594 1.657 1.720 1.782 1.844 1.907 1.970 2.032 2.094 2.157 2.220 2.282 2.344 2.407 2.470 2.532 2.594 2.657 2.720BS2A229:1972 6 BSI 02-2000Table 2 Bearing length L and overall length E 3 / 8 24 UNJF 7 / 16 20 UNJF 1 / 2 20 UNJF Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015 Pa
41、rt No. L 0.010 E 0.015 J32 J34 J36 J38 J40 J42 J44 J46 J48 J50 J52 J54 J56 J58 J60 J62 J64 J66 J68 J70 J72 J74 J76 J78 J80 J82 J84 J86 J88 J90 J92 J94 J96 in 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.87
42、5 5.000 5.125 5.250 5.375 5.500 5.625 5.750 5.875 6.000 in 2.641 2.766 2.891 3.016 3.141 3.266 3.391 3.516 3.641 3.766 3.891 4.016 4.141 4.266 4.391 4.516 4.641 4.766 4.891 5.016 5.141 5.266 5.391 5.516 5.641 5.766 5.891 6.016 6.141 6.266 6.391 6.516 6.641 L32 L34 L36 L38 L40 L42 L44 L46 L48 L50 L52
43、 L54 L56 L58 L60 L62 L64 L66 L68 L70 L72 L74 L76 L78 L80 L82 L84 L86 L88 L90 L92 L94 L96 in 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.875 5.000 5.125 5.250 5.375 5.500 5.625 5.750 5.875 6.000 in 2.656 2
44、.781 2.906 3.031 3.156 3.281 3.406 3.531 3.656 3.781 3.906 4.031 4.156 4.281 4.406 4.531 4.656 4.781 4.906 5.031 5.156 5.281 5.406 5.531 5.656 5.781 5.906 6.031 6.156 6.281 6.406 6.531 6.656 N32 N34 N36 N38 N40 N42 N44 N46 N48 N50 N52 N54 N56 N58 N60 N62 N64 N66 N68 N70 N72 N74 N76 N78 N80 N82 N84 N
45、86 N88 N90 N92 N94 N96 in 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.875 5.000 5.125 5.250 5.375 5.500 5.625 5.750 5.875 6.000 in 2.782 2.907 3.032 3.157 3.282 3.407 3.532 3.657 3.782 3.907 4.032 4.157 4
46、.282 4.407 4.532 4.657 4.782 4.907 5.032 5.157 5.282 5.407 5.532 5.657 5.782 5.907 6.032 6.157 6.282 6.407 6.532 6.657 6.782BS2A229:1972 BSI 02-2000 7Table 2 Bearing length L and overall length E 9 / 16 18 UNJF 5 / 8 18 UNJF Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015 Part No. L 0.010 E 0.015
47、Part No. L 0.010 E 0.015 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P30 P31 P32 P34 P36 P38 P40 P42 P44 P46 P48 P50 P52 P54 P56 P58 P60 P62 P64 P66 P68 P70 P72 in 0.312 0.375 0.438 0.500 0.562 0.625 0.688 0.750 0.812 0.875 0.938 1.000 1.062 1.125 1
48、.188 1.250 1.312 1.375 1.438 1.500 1.562 1.625 1.688 1.750 1.812 1.875 1.938 2.000 2.125 2.250 2.375 2.500 2.625 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 4.125 4.250 4.375 4.500 in 1.196 1.259 1.322 1.382 1.446 1.519 1.572 1.634 1.642 1.729 1.822 1.884 1.946 2.009 2.072 2.13
49、4 2.196 2.259 2.322 2.384 2.446 2.509 2.572 2.634 2.696 2.759 2.822 2.884 3.009 3.134 3.259 3.384 3.509 3.634 3.759 3.884 4.009 4.314 4.259 4.384 4.509 4.634 4.759 4.884 5.009 5.314 5.259 5.384 P74 P76 P78 P80 P82 P84 P86 P88 P90 P92 P94 P96 in 4.625 4.750 4.875 5.000 5.125 5.250 5.375 5.500 5.625 5.750 5.875 6.000 in 5.509 5.635 5.759 5.884 6.009 6.314 6.259 6.384 6.509 6.634 6.759 6.884 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q24 Q25
