1、BSI 3A*103 b2 W Lb24bb9 0108537 4 9 . .- -. FOREWORD . . -. BSI 3A8103 62 9 Lb2Ybb9 0108538 b . -. - c - TABLE 1. EIMENSIONS OF ORDINARY NUTS (liird Angie ?roj,jcction) t 7 *g Countersink 90-1200n one face only to nd jor diameter of thread 30b4300 Fig 1 - I “ - I “I- - I “ i 1 I 2 314 516 7 Width ac
2、ross c max. in 0.217 0.239 0-361 0-397 comers 0.505 0.577 0.650 0.794 0.866 1.010 1.033 1.337 143 1.660 quivalent ot Decimai nomhl size Part reference Widthhcros flats B ThiClinesS G I Left-hand thread. APL BPL CPL DPL EPL GPL JP!; LPL NPL PPL QPL SPL UPL WPL. Right-hand thread AP BP CP DP EP GP _.
3、iP LP NP PP QP SP UP WP “ max. in 0.105 0.125 0.155 0.167 0*200 0.312 . 0.255 QG75 0,437 0.500 0.562 0.687 0.750 0.875 min. in 0.183 0.245 0.307 0.339 0.431 0.493 0.5.54 . 069 0.741 0.866 0.%9 1.052 1.240 1.426 min. in 0.995 0.115 0.145 0.157 0.1% 0.240 0.302 O*SG 0427 0490 0.552 0677 0.740 * 0.865
4、ma. in 0.188 0.250 0.312 0.344 0.438 0.500 0.5fi2 0.688 0.750 0.875 0938 1.062 1.250 1458 0.1120 in 0.1380 0.2640 0.1m 0.2503 0.3125 0.3750 04375 0.5m 0.5625 06250 0.75% 0.8750 1.CCC9 No. UUNC No. 6-32 UNC Nn. 8-42 WC No, 10-32 UNF % in UNF YainUNF 3,s iq 1-W %e in UNF 14 h UNF Y8 in UNF 38 in UNF ?
5、r; in UNF 34 in UNF i hUNF I 1 ! c TABLE 2. DIMENSIONS OF THIN NUTS Nominal size equivalent of Decimai nominal size I !in No. 4-lOUNC 0.1900 No. 10-32 UNF 0.1380 No. 6-32 UPIC 0.1120 NO. 8-32 UNC 0.1640 0.2500 0.3125 0.3750 0.4375 0.5000 05625 0.6250 0-7500 0.8750 314 pait reierence 1 Right-hand Lef
6、t-hand thread I thread I I AT BT Cr DT ET GT JT LT NT PT QT ST UT WT ATL BTL CTL D“ ETL GTL JTL I LTL I NTL i QTL STL I PTL I i 516 Vidthhcross flats max. in 0.188 0.250 0.312 0.344 0.438 0.500 0.562 0.688 0.750 0.875 0.938 1*062 1.250 1.438 E min. i7 0.183 0.245 0.307 0-339 0.431 0.493 0.554 0.679
7、0-741 0.866 (3.929 1.052 1.240 146 ! “ I 7 Width corners BCiOSS C mm. in 0-217 0.289 0-361 0.397 0-505 0-577 0650 0.794 0.866 1.010 1.035 1.227 1443 1.660 “ i -1- i I : , mas. 0-073 in 0.089 0.113 0.123 0.133 . 0.166 0.208 0.250 0.291 0.333 0*35 0458 0.500 O.“ Jihl t “1 plerrink 90- 120cn diameter o
8、f thread one face only to major Fig. 2 I. I 3 A. 803, June, 1962 , TABLE 3. DIMENSIONS OF SLOTTED NUTS +“B“-! ! I J“I Countersink 90-120Qon this face oniy io major K diameter of thread I FiE. 3 NOTE. The slots may at the option or the nunufacturer be made rounded as in Table 4 Fig. 4, or rectangular
9、 as in Fig. 3 above. - “ I - I “ “ 819 Thickness G “ 314 ?art reference 13 1 14 Lowr face of nut to bottom of slot L “- 7 Width across corncrs C max. in 0,397 0.505 0.577 0.650 0.794 0.865 1.010 1,083 1.227 1.443 1.650 2 Decimal quiva- lent of nominal size 1 Nominal size No. 10-32 UNF in UNF %S in U
10、NF 96 in UNF in UNF ?4 in UNF %E in UNF 5/a in UNF % in UNF 7-6 in UNF 1 in UNF -8- Width across flats B “ msx. I min. O438 0.431 0.500 0.493 0.562 I 0.554 0.693 0.679 0.750 0.711 0.875 0.866 0.938 0.929 1.062 1.052 1.250 I 1.240 1,438 I 1.426 sot Width K Depth J approx. in 0.090 0.090 0-098 0.099 0
11、-140 0.1% 0.187 0.187 0.234 0.234 0.280 iight- hrend hand Left- llnnd hrcnd - min. in 0,249 0-250 0.270 0.302 0.365 0.427 0.490 0.552 0.677 0.740 0.865 - - - min. in 0.030 0.033 0.090 0.090 0.125 0.125 0.165 0.163 0.205 0.203 O*%O min. in 0.150 0.160 0.180 0.212 0.225 OC37 0.303 O465 0.443 .“V “La 0
12、.585 mm. in 0.250 0.260 0.2.20 0.312 0.375 0.437 0.500 0.562 0.687 0.750 0.m mm. in 0.090 0.100 0100 0.1Q 0.135 0.135 0.175 0.175 0*218 0.219 0.260 mas. in 0.160 0.170 0.190 0.222 0.235 9.297 0.m 0.375 0,453 0.516 0.595 in O*lSOo 0.2500 0.3125 0-3750 0.4375 0-5m 0.5625 06250 0.7500 06750 1.oooo DS E
13、S GS 1s LS KS PS QS SS us WS - c 4 BSI 3A*103 62 3b24bb7 OJO8543 b i“ -. c ._ - -. TAELZ 4. DIMENSIONS OF CASTLE NUTS (Tnird Angla Prajeciion) “I ad i 45charnfer I 1 1 - -Ccl_ln!ersink “=!2noon this face only ?o major diameter of thread i, I -. . . 30 430 Fig. 4 NOTE. The slots may at the option cf
14、the manufacturer be made rectangular as in Table 3 Fig. 3, or rounded as in FiS. 4 above. 1 3 2 Tlickness of hexagon face of nut fo from lower bottom of slots 1 portionanci ecimal equiva- lonal lent of suc Width across flats Wid& across corner! thickness Total eference Palt EC GC JC LC NC PC QC SC u
15、c WC MIC - mas. “ I “ I “ “ I “ 0438 in 0.500 0,562 0.668 0.750 0.875 0.938 1.062 1.250 “ 0.2500 in 0.3125 0.3750 04375 G-5609 06625 06250 0.7500 0.8750 % in UNF % in USF 7/iS in UNF %i in UXF 916 in UNF 96 in UNF 3/4 in UNF $/y in UNF 1 in UNF %S h UNF 0.493 0.554 0.679 0.741 0.866 0.929 1.052 1.24
16、0 I I i 5r I 3 A. 103, June, 1962 APPENDIX TAELE FOR COMZRSION OF INCEES TO APPROXIMATE MTLLIMETRE EQUIVALENTS . in mm ia 6.4 1 7.9 4 11.1 3 9.5 2 12.7 5 14.3 6 15.9 7 19.1 a 22.2 ,9 10 mm 25.4 76.2 101.6 12?-0 152.4 50.8 177.8 203.2 228.6 254.0 This British Standard, having been approved by the Air
17、craft Industry Standards Committee and endorsed by the Chairmm of the Enginecring Divisional Council, was published under the authority of the General Council of the Institution on 2nd h.Iay, 1962. The Institution desires to call attention to the fact that this standard does not purport to include a
18、ll the necessary provisions of a contract. British Stmdards are resised, when uecessary, b:? the isme either of atnar:dnant slip or of revised editions. It is importaxt that mers of British Stamkm!s slronld ascertain thar they are ir possession of the latest antetldnrznts or editiolu The following B
19、.S.I. references relate to the work on this standard: Committee reference ACE/l?. Draft for comment AB (ACE) 2151. c AMD 21 14 Amendment Slip No.1,. published 29 October 1976 to British Standard 3A. 103 : 1962 (Aerospace Series) Steel nuts (Unified hexagons and Unified threads) (ordinary, thin, slot
20、ted and castle) for aircraft Revised text Foreword. In the list of reference standards, and in numerical order, insert the following: 3.95 1 %r per cent nickel-chromium-molybdenum steel S96 2% per cent nickel-chromium-molybdenum steel S.142 1 per cent chromium-molybdenum steel S. 149 1 a7 5 per cent
21、 nickel-chromium-molybdenum steel S.154 2% % nickel-chromium-molybdenum steel billets, bars, forgings and parts (880 - 1080 MPa: limiting ruling section 150 mm) Clause 3a. After S.114 and 3.117 delete the brace and Over ?4 in UNF * After 73.1 17 insert the following: or S.95 or S.96 or SS54 or manuf
22、actured from material which complies with the latest issue of one of the following British Standards: S.142 or S.149 7610-2k-0 Gr O c AMD 2585 Amendment Slip No.2, published 28 April 1978 to British Standard 3A.103 : 1962 (Aerospace Series) Steel nuts (Unified hexagons and Unified threads) (ordinary
23、, thin, slotted and castle) for aircraft Revised text Foreword (as amended by Amendment No.1). Delete S.149 1-75 per cent nickel-chromium-molybdenum steel. Clause 3a (as amended by Amendment No.1). In the lines after or S.154 delete one of the following British Standards and substitute the following
24、 British Standard. Delete.or S.149. BSI 3A*303 62 Lb24667 0308545 3 W AMD 5389 Amendment No. 3 published and effecfive from 30 June 1988 to British Standard 3A. 103 : 1962 (Aerospace Series) Steel nuts (unified hexagons and unified threads) (ordinary, thin, slotted and castle) for aircraft Revised t
25、ext Foreword (as amended by Amendment Nos. 1 and 2). In the list of reference standards, delete S.96 2% per cent nickel-chromium-molybdenum steel. Clause 3a (as amended by Amendment Nos. 1 and 2). Delete or S.96. At the end of the text, insert the following note: NOTE. S.96 material may be useduntil stocks are exhausted. Table 4. In the heading for columns 11 and 12, delete L and substitute M.
