1、British Standard 3A 109: 1985 UDC 629.7.023.8 :621.882.211-034.14 0 British Standards Institution. No part of this publication may be photocopied or otherwise reproduced without the prior permission in writing of BSI British Standard Aerospace Series: Specification for Steel shear bolts (Unified hex
2、agons and Unified threads) Srie arospatiale. Boulons de cisaillement en acier ( hexagones et filetages unifis) - Spcifications Luft- und Raumfahrt-Reihe. Scherbolzen aus Stahl (Unified Sechskante und Unified Schraubengewinde) Page Contents Foreword 1 5 Anti-corrosion treatment Committees responsible
3、 Back page 6 Dimensions Specification 1 Scope 1 Tables 2 Procurement 1 1 Dimensions 3 Materials and manufacture 4 Mechanical properties for forged bolts in the 7 Screw threads 2 finally heat-treated condition 2 2 Bearing length L, clamping length M and overall length E Page 2 2 2 3 4 a Foreword This
4、 revision of this British Standard has been prepared, under the direction of the Aerospace Standards Committee, to include requirements for the manufacture of forged bolts. It supersedes British Standard 2A 109 which is withdrawn. An equivalent range of bolts with cadmium plated shanks suitable for
5、insertion in aluminium alloy materials is specified in British Standard 3A 112. Nuts suitable for use with either range of shear bolts are specified in British Standard 2A 1 IO. Compliance with a British Standard does not of itself confer immunity from legal obligations. I Scope This British Standar
6、d specifies materials, dimensions, finish and inspection requirements for steel shear bolts with Unified hexagons, Unified threads and close tolerance shanks for aerospace use. NOTE 1. The titles of the publications referred to in this standard are listed on the inside back page. NOTE 2. The latest
7、revision of an Aerospace Series standard is indicated by a prefix number. 2 Procurement The bolts shall comply with sections 1,2 and 3 of the latest edition of British Standard A 100. e British Standards Institution - I BSI 3A*I09 85 m Lb24669 0101237 I British Standard 3A 109 : 1985 3 Materials and
8、 manufacture The bolts shall be manufactured by one of the following methods: (a) machined from bright drawn bars which comply with Britu Standard S 154; (b) forged from material which complies with one of the -TE, gtiW-6ieTXunti-ttx sred following British Standards: 2s 147 2s 149 S 158, 4 Mechanica
9、l properties for forged bolts in the finally heat-treated condition Forged bolts in the finally heat-treated condition shall have the following mechanical properties: (a) 0.2 per cent proof stress: not less than 690 MPa; (b) tensile strength: 880 MPa to 1080 MPa; (c) elongation on 5.65 d-1: not less
10、 than 12 %; (d) Izod impact value: not less than 55 J. 2 5 Anti-corrosion treatment All finished bolts shall be coated on the head and thread with cadmium. Te.mporary rust preventive shall be applied to any uncoated portion of the bolt. NOTE, Coating on the underside of the head is optional. 6 Dimen
11、sions 6.1 All finished bolts, after the application of the anti- corrosion coating, shall be in accordance with the dimensions and tolerances given in tables 1 and 2. 6.2 Theclamping length Mof the bolt shall be in accordance with the dimensions and tolerances in table 2 and shall be such that, when
12、 a standard nut without countersink or a ring gauge without countersink has been screwed on as far as possible by hand, its leading face is within the distance M from the underside of the bolt head. The runout of the thread shall not exceed twice the pitch. 6.3 The nominal length of the bolt shall b
13、e the minimum bearing length i, which is determined by the minimum clamping length M less two thread pitches 7 Screw threads The bolts shall have Unified threads of the form and class of fit specified in the latest edition of British Standard A 100. -* British Standard 3A 109 : 1985 e - 5 m C al d d
14、 d L al O u LJ Yi 5 % Q o Yi O I + z I- 4 s .e Q X N O00 O0 oom mmm bb wmm *i I 999 99 999 .coo0 O0 O00 O00 O0 oom bbb mm mcob n .-00000000 11 ,999 99 999 .- O00 O0 O00 mmm mm mmm 999 99 999 .oooooooo O00 O0 O00 cvcvcv cvcv cvcvcv .-o00 O0 O00 .$ I ,-.y.-. -.-* -.-.-. I mml- o* mom mol- mm mrw E .GO
15、OOOOO-F d t cqy ai99 mo30 cvw om03 l,nq“cq.w? l-mo mw ml-m E .-o00 O0 O00 -mm l-mo3 O0 -rm -Cu ,999 77 777 .-O00 O0 O00 om0 mo moo ocvm l-o (um0 LO- mo mcvm .-o00 O0 O00 ,Ym.cT .?. uicql-. LULL LLLL LLLLLL zzz zz zzz 333 33 333 3 British Standard 3A 109 : 1985 Table 2. Bearing length L, clamping len
16、gth M and overall length E il4 in UNF Part No. 1E 2E 3E 4E 5E 6E 7E 8E 9E 10E 11E 12E 13E 14E 15E 16E 17E 18E 19E 20 E 21 E 22 E 23E 24E 25 E *See 6.3. *L min. in o. 1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 .o 1 .I 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 M +o -0.03 in 0.201 0.301 0.401 0.
17、501 0.701 0.801 0.90 1 1.001 1.101 1,201 1.301 1.401 1.501 1.601 1.701 1.801 1 .go1 2.001 2.101 2.201 2.301 2.401 2.501 2.601 0.601 * E +0.04 -0 in 0.50 0.60 0.70 0.80 0.90 1 .o0 1.10 1.20 1.30 l.40 1,50 1.60 1.70 1.80 1 .go 2.00 2.1 o 2,20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 5/1 in UNF Pari No. 1G 2
18、G 3G 4G 5G 6G 7G 8G 9G 1 OG 11G 12G 13G 14G 15G 16G 17G 18G 19G 20G 21 G 22G 23G 24G 25G 26G 27G 28G 29G 30G *L min. in 0.1 0.2 O .3 0.4 O .5 0.6 0.7 O ,8 0.9 1 .o 1 .I 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 .O M +o -0.03 in 0.21 3 0.313 0.413 0.5 13 0.613 0.7 13 0
19、.813 0.9 13 1.013 1.1 13 1.213 1.313 1.413 1.513 1.613 1.713 1.813 1.913 2.013 2.1 13 2.213 2.313 2.413 2.513 2.61 3 2.7 13 2.813 2.913 3.013 3.1 13 E +0.04 -0 in 0.5 1 0.61 0.7 1 0.8 1 0.91 1.01 1.1 1 1.21 1.31 1.41 1.51 1.61 1.71 1.81 1.91 2.01 2.1 1 2.21 2.3 1 2.41 2.51 2.61 2.7 1 2.81 2.91 3.01
20、3.1 1 3.21 3.31 3.4 1 Table 2 (continued) in UNF Part No. 1J 25 35 4J 55 6J 7J 8J 9J 1 OJ 11J 12J 13J 14J 155 16J 175 185 19J 20J 21J 225 233 245 25J 26J 27J 285 295 30J 315 32J 33J 355 34J *See 6.3. *L min. in 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 .o 1 .I 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 .o 2.1 2.
21、2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 M to -0.03 in 0.213 0.3 13 0.413 0.5 13 0.613 0.7 13 0.813 0.9 13 1.013 1.1 13 1.213 1.313 1.413 1.513 1.613 1.713 1.813 1.913 2.013 2.1 13 2.2 13 2.3 13 2.413 2.5 13 2.6 13 2.713 2.813 2.913 3.013 3.1 13 3.213 3.3 13 3.413 3.513 3.613 E t0.04 -0
22、 in 0.5 1 0.61 0.71 0.81 0.91 1.01 1.11 1.21 1.31 1.41 1.51 1.61 1.71 1.81 1.91 2.01 2.1 1 2.21 2.31 2.41 2.51 2.6t 2.7 1 2.81 2.91 3.0 1 3.1 1 3.21 3.3 1 3.4 1 3.5 1 3.61 3.7 1 3.81 3.9 1 7/16 in UNF Part No. IL 2L 3L 4L 5L 6L 7L 8L 9L 10L 11L 12L 13L 14L 15L 16L 17L 18L 19L 20 L 21 L 22 L 23 L 24L
23、 . 25 L 26L 27 L 28 L 29 L 30 L 31 L 32 L 33L 34 L 35 L 36 L 37 L 38 L 39 L 40 L *L min. in 0.1 0.2 O 3 0.4 0.5 0.6 0.7 0.8 0.9 1 .o 1 .I 1.2 1 3 1.4 1.5 1.6 1.7 1.8 1.9 2 .o 2.1 2.2 2 -3 2.4 2.5 2.6 2.7 2.8 2.9 3 .O 3.1 3.2 3.3 3 A 3.5 3.6 3.7 3.8 3.9 4 .O M to -0.03 in 0.230 0.330 0.430 0.530 0.63
24、0 0.730 0.830 0.930 1 .O30 1 .I 30 1.230 1.330 1.430 1.530 1.630 1.730 1.830 1.930 2.030 2.1 30 2.230 2.330 2.430 2.530 2.630 2.730 2.830 2.930 3.030 3.1 30 3.230 3.330 3.430 3.530 3.630 3.730 3.830 3.930 4.030 4.1 30 E t0.04 -0 in 0.54 0.64 0.74 0.84 0.94 1 .O4 1.14 1.24 1.34 1.44 1.54 1.64 1.74 1.
25、84 1.94 2.04 2.1 4 2.24 2.34 2.44 2.54 2.64 2.74 2.84 2.94 3.04 3.1 4 3.24 3.34 3.44 3.54 3.64 3.74 3.84 3.94 4.04 4.1 4 4.24 4.34 4.44 British Standard 3A 109 : 1985 1 ! 5 BSI 3A*309 85 HU Lb24bb9 8303243 3 lis British Standard 3A 109 : 1985 Table 2 (continued) In UNP Part No. IN 2N 3N 5N 6N 7N 8N
26、9N 1 ON 11N 12N 13N 14N 15N 16N 17N 18N 19N 20N 21 N 22 N 23N 24N 25N 4N . *See 6.3. *L min. in 0.1 0.2 0.3 O A 0.5 0.6 0.7 0.8 0.9 1 .o 1 .I 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 .o 2.1 2.2 2.3 2.4 2.5 M +O -0.03 in 0.230 0.330 0.430 0.530 0.630 0.730 0.830 0.930 1 .O30 1 .I 30 1.230 1.330 1.430 1.530
27、1.630 1.730 1.830 1.930 2.030 2.1 30 2.230 2.330 2.430 2.530 2.630 E t0.04 -o in 0.54 0.64 0.74 0.84 0.94 1 .O4 1.14 1.24 1.34 1.44 1.54 1.64 1.74 1.84 1.94 2.04 2.1 4 2.24 2.34 2.44 2.54 2.64 2.74 2.84 2.94 Part No. 26N 27 N 28N 29N 30N 31 N 32N 33N 34N 35 N 36 N 37 N 38 N 39 N 40 N 41 N 42 N 43N 4
28、4N 45 N L min. in 2.6 2.7 2.8 2.9 3 .O 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 M +o 4.03 in 2.730 2.830 2.930 3.030 3.1 30 3.230 3.330 3.430 3.530 3.630 3.730 3.830 3.930 4.030 4.1 30 4.230 4.330 4.430 4.530 4.630 E m.04 -o in 3.04 3.14 3.24 3.34 3.44 3.54 3.64 3.74 3.84 3.94 4.0
29、4 4.1 4 4.24 4.34 4.44 4.54 4.64 4.74 4.84 4.94 6 British Standard 3A 1 O9 : 1985 rable 2 (continued) in UNF art No. 1P 2P 3P 4P 5P 6P 7P 8P 9P 10P 11P 12P 13P 14P 15P 16P 17P 18P 19P 20P 21 P 22P 23P 24P 25P 26P 27 P 28P 29P 30P 31P 32P 33P 34P 35 P 36P 37P 38P 39P 40P 41 P 42 P 43P 44P 45 P *See 6
30、.3. *L min. n 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 1 .o 1 .I 1.2 1.3 1.4 1.5 1.6 1.7 I .8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 .O 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 .O 4.1 4.2 4.3 4.4 4.5 U bO -0.03 in 3.241 3.341 3.441 3.541 3.641 3.741 3.841 3.941 1.041 1.141 1.241 1.341 1.441 1.541 1.6
31、41 1.741 1.841 1.941 2.041 2.141 2.241 2.341 2.441 2,541 2.641 2.741 2.841 2.941 3.041 3.141 3.241 3.341 3.441 3.541 3.64 1 3.741 3.84 1 3.941 4.041 4.141 4.241 4.341 4.441 4.541 4.64 1 E k0.04 -0 in 3.55 3.65 3.75 D.85 0.95 1 .O5 1.15 1.25 1.35 1.45 1.55 1.65 1.75 1.85 1.95 2.05 2.1 5 2.25 2.35 2.4
32、5 2.55 2.65 2.75 2.85 2.95 3.05 3.1 5 3.25 3.35 3.45 3.55 3.65 3.75 3.85 3.95 4.05 4.1 5 4.25 4.35 4.45 4.55 4.65 4.75 4.85 4.95 in UNF Part No. 1Q 20 30 40 5Q 60 7Q 80 9Q 1 OQ 11Q 120 13Q 140 150 160 17Q 18Q 19Q 20Q 210 22Q 23Q 24Q 25Q 26Q 27Q 280 29Q 30Q 31 Q 32 Q 330 34Q 35Q 36Q 37Q 380 39Q 40Q 4
33、1 Q 420 430 440 450 *L min. in 0.1 0.2 D .3 O .4 0.5 0.6 0.7 0.8 0.9 1 .o 1 .I 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 .O 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 M +o -0.03 in 0.241 0.341 0.441 0.541 O .64 1 0.741 0.841 0.941 1 .O41 1 .I 41 1.241
34、 1.341 1.441 1.541 1.641 1.741 1.841 1.941 2.041 2.1 41 2.241 2.341 2.441 2.541 2.641 2.741 2.841 2.941 3.041 3.141 3.241 3.341 3.441 3.541 3.641 3.741 3.841 3.941 4.041 4.141 4.241 4.341 4.441 4.541 4.641 E t0.04 -o in 0.56 0.66 0.76 0.86 0.96 1 .O6 1.16 1.26 1.36 1.46 1.56 1.66 1.76 1.86 1.96 2.06
35、 2.1 6 2.26 2.36 2.46 2.55 2.66 2.76 2.86 2.96 3.06 3.1 6 3.26 3.36 3.46 3.56 3.66 3.76 3.86 3.96 4.06 4.16 4.26 4.36 4.46 4.55 4.66 4.76 4.86 4.96 7 British Standard 3A 109 : 1985 Table 2 (concluded) 3/14 in UNF Part No. 1s 2s 3s 4s 5s 6s 7s 8s 9s 1 os 11s 12s 13s 14s 15s 16s 17s 18s 19s 20s 21s 22
36、s 23s 24s 25s 26s 27s 28s 29s 30s 31s 32s 33s 34s 35s 36s 37s 38s 39s 40s 41s 42s 43s 44s 45s *See 6.3. “L min. in o. 1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 .o 1 .I 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 1.0 1.1 1.2 1.3 1.4 1.5 M
37、+O 403 in 0.255 0.355 0.455 0.555 0.655 0.755 0.855 0.955 1.055 1.155 1.255 1.355 1.455 1.555 1.655 i .755 1.855 1.955 2.055 2.1 55 2.255 2.355 2.455 2.555 2.655 2.755 2.855 2.955 3.055 3.1 55 3.255 3.355 3.455 3.555 3.655 3,755 3.855 3.955 1,055 LI55 1.255 1.355 1.455 1.555 1.655 E +0.04 -o in 0.59
38、 0.69 0.79 0.89 0.99 1 .o9 1.19 1.29 1.39 1.49 1.59 1.69 1.79 1.89 1.99 2.1 9 2.29 2.39 2.49 2.59 2.69 2.79 2.89 2.99 3.09 3.19 3.29 3.39 3.49 3.59 3.69 3.79 3.89 3.99 4.09 4.19 4.29 . 4.39 4.49 4.59 4.69 4.79 4.89 4.99 2.09 8 Publications referred to General reauirements for bolts and nuts of tensi
39、le strength not exceeding 180 O00 Ibf/in* (125 hbar) * British Standard A 100 British Standard 2A 110* British Standard 3A 112 British Standard 2s 147 British Standard 2s 149 British Standard 5154 British Standard S 158 Steel nuts (Unified hexagons and Unified threads) for shear bolts for aircraft S
40、pecification for cdmiumplated steel shear bolts (Unified hexagons and Unified threads) 0.5 per cent nickelchromiummolybdenurn steel bars for the manufacture of forged bolts and forged nuts 1.75 per cent nickelchromium-molybdenum steel bars for the manufacture of forged bolts and forged nuts 2% per c
41、ent nickel-chromium-molybdenum steel billets, bars, forgings and parts (880-1080 MPa: limiting ruling section 150 mrn) Specification for 1 per cent chromium-molybdenum steel bars for the manufacture of forged bolts and forged nuts *Referred to in the foreword only. a For information about BSI servic
42、es relating to third party certification to suitable British Standard product specifications, schemes for the registration of fimis of assessed capability, testing and inspection facilities, please contact the Director, Quality Assurance Division, BSI, PO Box 375, Miiton Keynes MK14 6LO. BSI 3A*l109
43、 85 S - Lb24bb9 OlOL245 O t .- British Standard 3A 109: 1985 This British Standard, having been prepared under the direction of the Aerospace Standards Committee, was published under the authority of the Board of BSI and comes into effect on 29 November 1985. O British Standards Institution, 1985 IS
44、BN O 580 14738 X British Standards Institution Incorporated by Royal Charter, BSI is the independent national body for the preparation of British Standards. It is the UK member of the International Organizatlon for Standardization and UK sponsor of the British National Committee of the Internetional
45、 Electrotechnical Commission, Copyright Users of British Standards are reminded that copyright subsists in all BSi publications. No part of this publication may be reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in thecourse of implementing
46、 the standard, of necessary details such as symbols end size, type or grade designations. Enquiries should be addressed to the Publication$ Manager, British Standards Institution, Linford Wood, Milton Keynes MK14 6LE. The number for telephone enquiries is 0908 320033 and for telex 825777. Contract r
47、equirements A British Standard does not purport to include all the necescary provisions of a contract. Users of British Standards are responsible for their correct application. Revision of British Standards British Standards are revised, when necessary, by the issue either of amendments or of revise
48、d editions. It is important that users of British Standards should ascertain that they are in possession of the latest amendments or editions. Informetion on ail BSI publications is in the BSI Catalogue. supplemented each month by BSI News which is available to subscribing members of the Institution
49、 and gives details of new publications, revisions, amendments and withdrawn standards. Any person who, when making use of a British Standard, encounters an inaccuracy or ambiguity, is requested to notify BSI without delay in order that the matter may be investigated and appropriate action taken. The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for comment 84/78528 DC Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Committee (AC
