1、UD 621.882.215.082.3 : 669.715 : 629.131 3 A. 171, November, 1962 B RIT I S H S T AND ARD S IN S TI TUT1 ON lNcoRPoRATm By CHARTER Telephone: MAYFAIR 9MO BRITISH STANDARDS HOUSE, 2 PARK STREET, LONDON, W.l Tclegrnms: STANDARDS, LONDON, W.1. BRITISH STANDARD SPECIFICATION FOR ALUMINIUM ALLOY PAN HEAD
2、 BOLTS (UNIFIED THREADS) FOR AIRCRAFT FOREWORD This revision of British Standard 2A. 171 : 1956 has been prepared to relate the standard to the relevant requirements of British Standard A. 100. Reference is made in the standard to the following British Standards: A.100 Bolts and nuts for aircraft (g
3、eneral clauses). I - .culathg the approximate miltimetre equivalent of the inch dimensions. More accurate conversions should be based on the tables in B.S. 350, ,Conversion factors and tables. -spZIFKA TPO - SCOPE 1. This British Standard specifies the materials, dimensions and inspection requiremen
4、ts for aluminium alloy pan head bolts with Unified threads for aircraft. GENERAL REQUiREhENTS 2. The bolts shall comply with the relevant requirements of Part 1 of British Standard A.100, Bolts and nuts for aircraft (general elauses), in respect of manufacture, screw threads, anti-corrosion treatmen
5、t, identification and marking. 3. The bolts shall be machined from bars which comply with the latest issue of British StandardL-B 4. a. All finished bolts shall conform to the dimensions and tolerances given in Tables 1 and 2. b. The clamping length of the bolt shall conform to the dimensions and to
6、lerances given in Table 2, and shall be such that, when a standard nut without countersink or ring gauge without countersink has been screwed on as far as possible by hand, its leading face is within the distance M MATERIAL AND MANUFACURE DIMENSIONS from the underside of the bolt head. The run-out o
7、f thread shall not exceed twice the pitch. c. The nominal length of the bolt shali be the minimum bearing length L, which is determined by the minimum clamping length M, less two thread pitches. SCREW THREADS 5. The bolts shall have Unified threads of the form and class of fit specified in the relev
8、ant requirements of British Standard A.100, Part 1. .4NTI-CORROSION TREATMEEIT 6. All finished bolts shall be anodized. IDENWICATION Ah?) MAMIKG 7. All bolts shall be dyed green by an appropriate process. NOTE. Because of the use of chromic acid process for anodizing, the bolts will not necessarily
9、be uniformly coloured after dyeing. INSPECTION PROCEDURE 8. The bolts shall be inspected in accordance with the relevant requirements of British Standard A.100, Part 2. Price 5/- net. BSI 3A*171 62 W 1624669 0101352 1 W - 1 3 A. 171, November, 1962 TABLE 1. DIMENSIONS I U rad. Gil? rad. d t (clampin
10、g length)* i_-_ T- - M* E* (overall length) * Fig. 1 I 1 I *For bearing length L, clamping length M and overall length E see Table 2. jhis dimension is an absolute minimum associated with maximum length M and minimum length E. It is not intended for use for $,To be measured from the top of the head
11、to the point at which the slot breaks through. manufacturing or inspection purposes. 2 3 A. 171, November, 1962 TABLE 2. BEARING LENGTH L, CLAMPING LENGTH M AND OVERALL LENGTH E u* t UM- i L- -E- Fig. 2 No. 4-10 UNC M Part *i -LO KO min. 4.03 in in - *A 0.05 0.130 1A 0-1 0.180 2A 0-2 0.280 3A 0.3 0.
12、380 No. 6-32 UNC NO. 10-32 UXF NO. 8-32 UNC I_ Part NO. - AB 1B 2B 3B 4B 5B -_ L min. in 0.05 0.1 0.2 0.3 0.4 0-5 .- E -0.04 -0 in 0.45 0.50 0.60 0.70 0-80 0.90 1.00 1.10 1.20 1.30 1.40 1-50 1.60 1.70 1 -80 1.90 2-00 2-10 2.20 2-30 2-40 2.50 2.60 2.70 2.80 2-90 3.00 3.10 3.20 3.30 3-40 3.50 3.60 3.7
13、0 3-80 3.90 4.00 4.10 4.20 Part I *A j in No. , rmn. - *D 0.05 1D a 0.1 2D 0.2 3D I 0.3 4D 0.4 5D , 0.5 6D . 0.6 7D , 0.7 8D 1 0.8 9D 0.9 1OD 1.0 I M +O -0.03 E +OW -0 E +O.M -0 -_ in 0-143 0.193 0.293 0.393 0.493 0.593 0.693 0-793 0.893 0.993 1.093 1.193 1.293 1.393 1-493 1.593 1.693 1.793 1.993 2.
14、093 2.193 2-293 1.893 in 0.45 0.50 0.60 0.70 0.80 0.90 1 *o0 1.10 1.20 1-30 1.40 1 a50 1.60 1 -70 1.80 1.90 2.00 2.10 2.20 2-30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 3 -10 3-20 3.30 3.40 3 -50 3-60 3.70 3.80 i in in I in +C f 0.05 0.143 ; 0.50 1C , 0.1 0.193 0.55 2C * 0.2 0.293 0.65 3C 0.3 i 0.393 j 0.
15、75 4C ; 0.4 0.493 0.85 SC 0.5 0.593 0.95 6C 0.6 I 0.693 1.05 7C 0.7 0.793 1.15 8C ! 0.8 0.893 1.25 9C j 0.9 1 0.993 1.35 1OC . 1.0 1.093 1 1.45 I I ! in 0.143 0.193 0.293 0.393 0.493 0.593 0.693 0.793 0.893 0.993 1.093 1.193 1.293 in 0.55 0.60 0.70 0.80 0.90 1.00 1-10 1.20 1-30 1.40 1-50 1 *60 1-70
16、1.80 1-90 2-00 2.10 2.20 2.30 2-40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60 3.70 3.80 4A 0.4 SA 0-5 6A i 0.6 7A 0.7 BA 0.8 0.480 0.580 0.680 0.780 0.880 0.980 1 *o80 1.180 1 .!Bo 1.380 1.480 1 380 1-680 1,780 1.880 1.980 2.080 2.180 2.280 2.380 2-480 2.580 2-680 2.780 2.880 2.980
17、3 -080 3,180 3.280 3.380 3.480 3.580 3.680 3.780 3-880 6B i 0.6 7B i 0-7 8B 0.8 9A 10A 11A 12A 13A 14A 1 5A 0.9 1.0 1.1 1 -2 1 -3 1.4 1.5 9B 0.9 1OB 11B 12B 13B 14B 1SB 16B 17B 18B 19B 20B 21B 22B 23B 24B 25B 26B 27B 28B 29B 30B 31B 32B 33B 34B 35B 36B 37B 38B 1.0 1 *1 1.2 1 e3 1.4 1 -5 1.6 1.7 1.8
18、1.9 2.0 2 -1 2-2 1 *1 1 -2 11c 12c 13C 14C 15C 16C 17C 18C 19C 2oc 21c 1.1 1.193 1.55 1.2 i 1.293 , 1.65 1.3 1.393 i 1.75 1-4 1.493 f 1.85 1.5 i 1,593 ! 1.95 1.6 1.693 2-05 1-7 1.793 2-15 1.8 ! 1.893 2.25 1.9 1.993 2.35 2.0 2.093 2.45 2.1 2.193 2.55 11D 12D 13D 14D 15D 16D 17D 18D 19D 20D 21D 22D 23
19、D 24D 25D 26D 27D 28D 29D 30D 31D 32D 33D 34D 35D 36D 37D 38D - 1.3 1.393 1.4 ! 1.493 1.5 1 1.593 1.6 1.693 1-7 1.793 1.8 1.893 16A 1.6 17A i 1.7 18A 1.8 19A , 1.9 LOA 2.0 21A 2-1 22A 2-2 23A 2.3 24A 24 25A j 2.5 26A ! 2.6 27A ! 2.7 29A , 2.9 30A I 3.0 28 . 2.8 1.993 2.093 2.193 2.293 2.393 2-493 2.
20、593 2-693 2.793 2.893 2-993 3.093 3-193 3.293 3.393 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 22c , 2.2 23C 2.3 24C i 2.4 25C i 2.5 2.293 2.393 2.493 2.593 2.693 2.793 2.893 2.993 3.093 3.193 3.293 3.393 3.493 3.593 3.693 3.793 3.893 - 2.65 2.75 2.85 2.95 3.05
21、 3-15 3.25 3.35 3.45 3-55 3-65 3 *75 3.85 3.95 4.05 4.15 4.25 2.3 2.393 2.4 i 2.493 2*5 I 2.593 2.6 1 2.693 2.7 1 2.793 2.8 2.893 2-9 3.0 I 5% 3-1 1 3.2 ! 3.4 ; 3.493 3.3 I 3.393 26C 27C 28C 29C 3oc 31C 32C 33c 34c 35c 36C 37c 38C - 2.6 2.7 2.8 2.9 3-0 3 e1 3 -2 3 -3 3-4 3.5 3.6 3-7 3.8 31A 3.1 32A
22、3.2 33A 3.3 MA I 3-4 35A 3.5 36A 3.6 37A 1 3.7 38A i 3-8 I 3.493 3-90 3.593 4-00 3.693 4.10 3.793 4-20 3.893 , 4.30 ! 3 3.5 : 3.593 3-90 3.6 1 3.693 I 4.00 3.7 I 3.793 j 4.10 3.8 i 3.893 1 4.20 ! * See Clause 4c. 3 4 L A. 171, November, ES1 3A*ll b2 m Lb2Ybb OlOl35m 1962 TABLE 2 Continued BEARING LE
23、NGTH L, CLAMPING LENGTH M AND OVERALL LENGTH E in UNF . Part I *L No. I inin. ! in -_I- I &E 1 0.05 1E 2E 3E ?E SE 6E 7E XE 9E 1 OE 11E 12E 13E 14E 15E 16E 17E 1 SE 19E ZOE 21E 22E 23E 24E 25E 26E 27E 28E 29E 30E 31E 32E 33E 34E 35E 36E 37E 38E 0.1 0.2 0-3 O4 0.5 0.6 0.7 0.8 0.9 1.0 1 -1 1 *2 1.3 1.
24、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 - * See Clause 412. M +O -0.03 in 0.151 0.201 0.301 0.401 0.501 0.601 0.701 0.801 0.901 1.001 1.101 1.201 1.301 1.401 1.501 1601 1.701 1.801 1.901 2-001 2-101 2.201 2.301 2.401 2.501 2.601 2401 2.80
25、1 2.901 3.001 3.101 3,201 3.301 3,401 3.501 3.601 3.701 3.801 3.901 - E +0.04 -0 in 0.65 0.70 0.80 0-90 1.00 1.10 1 -20 1.30 1.40 1.50 1*60 1-70 1-80 1.90 2.00 2-10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3 .o0 3.10 3.20 3.30 3-40 3.50 3-60 3.70 3.80 3.90 4.00 4.10 4.20 4.30 4.40 - Part No. K+ 1G 2G
26、 3G 4G 5G 6G 7G 8G 9G 10G 11G 12G 13G 14G 15G 16G 17G 18G 19G 20G 21G 22G 23G 2AG 25G 26G 27G 2SG 29G 3oG 31G 32G 33G 34G 35G 36G 37G 38G - in UNF *.L min. in 0.05 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1-1 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
27、3.4 3.5 3.6 3.7 3.8 M +O -0.03 in 0.163 0.213 0.313 0,413 0,513 0.613 0.713 0-813 0.913 1.013 1.113 1.213 1.313 1.413 1.513 1.613 1.713 1.813 1.913 2.013 2-113 2.213 2.313 2.413 2.513 2.613 2.713 2.813 2.913 3.013 3.113 3.213 3.313 3.413 3.513 3.613 3.713 3.913 3.813 E 1-0.04 -0 in 0-70 0.75 0.55 0.
28、95 1.05 1.15 1.25 1.35 1.45 1-55 1.65 1.75 1.95 2.05 2-15 2-25 2.35 2.45 2-55 2-65 2.75 2.85 2.95 3.05 3.1: 3.25 3-35 3.45 3.55 3.65 3-75 3.85 3-95 4-05 4.15 4.25 445 445 1.85 BSI 3A8373 62 m 3624669 0303355 7 m i 3 A. 171, November, 1962 APPENDIX TABLE FOR CONVERSION OF INCHES TO APPROXIMATE MILLIM
29、ETRE EQUIVALENTS in :mm - 1 I 25.4 2 50.8 3 I 76.2 4 101.6 5 127.0 6 I 1524 7 ! 177.8 19.1 8 i 203.2 I 9 228.6 10 1 254.0 w This British Standard, having been approved by the Aircraft Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under
30、 the authority of the General Council of the Institution on 8th November, 1962. The Institution desires to call attention to the fact that this British Standard does not purport to include all the necessary provisions of a contrxt. British Standards are revised, when necessary, by the issue either o
31、f antendment slips or of revised editions. It is important that users of British Standards shorild ascertaiti that they are in possessioii of the latest amendments or editions. The following B.S.I. references relate to the work on this standard: Committee reference ACE!l2. Draft for comment AB (ACE)
32、 5544. .-_ Priiited hi England bv Gaylard &i Son LfdLondon. S.E.14 G5628 250011162 BSI 3A%371 b2 E lb24bb7 0303356 9 E AMD 4699 Amendment No. 1 to British Standard 3A. 17 1 : 1962 (Aerospace Series) published and effective from 29 March 1985 Aluminium alloy pan head bolts (Unified threads) for aircr
33、aft Revised text Foreword. Delete L.65 Aluminium - copper - magnesium - silicon - manganese alloy bars and extruded sections (solution treated and precipitation treated) and substitute L.168 Specification for bars and extruded sections of aluminium - copper - magnesium - silicon - manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension). Clause 3. Material and manufacture. In line 2, delete L.65 and substitute L. 168. 85034-1.4k-B ACE112
