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英制螺纹标准对照表
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1、英制螺纹标准对照表英制普通螺纹（惠氏螺纹）-小螺纹系列（BA）名义尺寸BA牙型代号大径mm d=D螺距mm P每英寸牙数tpi中径mm d2=D2小径外螺纹 d3牙型高H1底孔直径mmNo. 14BA10.23r 110.40.860.720.140.75No. 13BA1.20.25101.61.050.90.150.95No. 12BA1.30.2890.711.130.960.171No. 11BA1.50.3181.931.3151.130.1851.2No. 10BA 1.70.3572.571.491.280.211.35 nNo. 9BA1.90.3965.121.6651.43
2、0.2351.5No. 8BA2.20.4359.071.941.680.261.8No. 7BA2.50.4852.922.211.920.292No. 6BA2.80.5347.922.482.160.322.3No. 5BA 3.20.59P 43.052.8452.490.3552.6 1No. 4BA -3.60.66P 38.483.2052.810.3952.95No. 3BA4.10.7334.793.663.220.443.4No. 2BA4.70.8131.354.2153.730.4853.9No. 1BA5.30.9P 28.224.764.220.544.4No. 0
3、BA6125.45.44.80.65|螺纹代号基本尺寸英寸5!大径mmd=D5 圆锥螺距mmP管螺纹型H每英寸牙数tpi通口尺寸中径mmd2=D2小径外螺纹d3牙型高度H1圆弧尺寸r底孔尺寸mmR 1/161/16 "7.7230.907287.1426.5610.5810.1256.4R 1/81/8 "9.7280.907289.1478.5660.5810.1258.4R 1/41/4 "13.1571.3371912.30111.4450.8560.18411.2R 3/83/8 "16.6621.3371915.80614.950.
4、8560.18414.75R 1/21/2 "20.9551.8141419.79318.6311.1620.24918.25R 3/43/4 "26.4411.8141425.27924.1171.1620.24923.75R 11"33.2492.3091131.7730.2911.4790.31730R 1 1/41 1/4 "41.912.3091140.43138.9521.4790.31738.5R 1 1/21 1/2 "47.8032.3091146.32444.8451.4790.31744.5R 22"59.614
5、2.3091158.13556.6561.4790.31756R 2 1/22 1/2 "75.1842.3091173.70572.2261.4790.31771R 33"87.8842.3091186.40584.9261.4790.31785.5R 44 H113.032.30911111.551110.0721.4790.317110.5R 55"138.432.30911136.951135.4721.4790.317136R 66"163.832.30911162.351160.8721.4790.317161.555。圆锥管螺纹型式和尺寸底
6、孔尺 寸mm螺纹代号基本尺寸英寸大径mm d=D螺距mm P每英寸牙数 tpi中径mm d2=D2小径外螺纹 d3牙型高度H1圆弧尺寸rR 1/161/16"7.7230.907287.1426.5610.5810.1256.4R 1/81/8"9.7280.907289.1478.566 10.581:0.1258.4 -1R 1/41/4"13.1571.3371912.30111.4450.8560.18411.2R 3/83/8"16.6621.3371915.80614.950.8560.18414.75R 1/21/2"20.95
7、51.8141419.79318.631 11.162:0.24918.251R 3/43/4"26.4411.8141425.27924.1171.1620.24923.75R 11"33.2492.3091131.7730.2911.4790.31730R 1 1/41 1/4 "41.912.3091140.43138.9521.4790.31738.5R 1 1/21 1/2 "47.8032.3091146.32444.8451.4790.31744.5R 22H59.6142.3091158.13556.6561.4790.31756R 2
8、1/22 1/2 "75.184P 2.30911173.70572.226 1.479P 0.31771 R 33H87.8842.3091186.40584.9261.4790.31785.5R 44H113.032.30911111.551110.0721.4790.317110.5R 55"138.43P 2.309 111136.951135.4721.479:0.31713671R 66H163.832.30911162.351160.8721.4790.317161.5 J制惠氏螺纹的型式尺寸英制普通螺纹(惠氏螺纹)-粗牙(BSW)名义尺寸Ww牙型代号大径mm
9、 d=D螺距mm P每英寸牙数tpi中径mm d2=D2小径外螺纹 d3牙型高H1底孔直径mm1/16 "BSW1.5870.423601.3151.050.271.153/32 "BSW2.3810.529482.0411.7030.3381.91/8 "r bsw3.175P 0.635402.7682.3620.4062.5 5/32 "P BSWP 3.969P 0.793323.4592.9520.5073.23/16 "BSW4.7621.058244.0843.4070.6773.77/32 ":BSWP 5.556r
10、1.058244.8784.2010.6774.5 1/4 "BSW6.351.27205.5374.7240.8135.15/16 "BSW7.9381.411187.0346.1310.9046.53/8 ":BSW9.525P 1.588168.5097.4921.0177.9 7/16 "BSW11.1131.814149.9518.7891.1629.21/2 "BSW12.72.1171211.3459.991.35510.45/8 "r bswr 15.876P 2.3091114.39712.9181.47913.4
11、13/4 "BSW19.0512.541017.42415.7981.62716.257/8 "BSW22.2262.822920.41918.6111.80719.251"BSW25.43.175823.36821.3352.033221 1/8 "BSW28.5763.629726.25323.9292.32424.51 1/4 "BSW31.7513.629729.42827.1042.32427.251 3/8 "BSW34.9264.233632.21529.5052.71130.251 1/2 "BSW38.14
12、.233635.39132.682.71133.51 5/8 "BSW41.2775.08538.02434.7713.25335.51 3/4 "BSW44.4525.08541.199 137.946 13.253 38.51 7/8 "BSW47.6275.6454 1/244.01240.3983.61441.252HBSW50.8025.6454 1/247.18743.5733.61444.52 1/4 "BSW57.1526.35453.086 ：49.0214.066 H502 1/2 "BSW63.5026.35459.436
13、55.374.066562 3/4 "BSW69.8537.2573 1/265.20560.5584.647 61.53HBSW76.2037.2573 1/271.556：66.909 14.6471683 1/4 "BSW82.5537.8163 1/477.54872.5445.00573.753 1/2 "BSW88.9037.8163 1/483.899 178.894 5.005 1803 3/4 "BSW95.2548.467389.832 184.415.42285.54HBSW101.6048.467396.18290.765.422
14、924 1/4 "BSW107.9548.8352 7/8102.297 96.639 5.657 1984 1/2 "BSW114.3048.8352 7/8108.647102.99 15.657104.24 3/4 "BSW120.6659.2372 3/4114.74108.6255.9151105HBSW127.0059.2372 3/4121.09 1115.17615.915 1116.55 1/4 "BSW133.3559.6772 5/8127.159 120.9636.196122.55 1/2 "BSW139.7059.6
15、772 5/8133.509127.3136.196128.55 3/4 "BSW146.05510.162 1/2139.549 133.043：6.506 1134.56HBSW152.40610.162 1/2145.9139.3946.506141制惠氏螺纹的型式尺寸名义尺寸Ww牙型代号英制普通小大径mmd=D素纹（惠氏螺距mmP螺纹）-咪每英寸牙数tpi且牙（BSW中径mm d2=D2小径外螺纹d3牙型高H1底孔直径mm1/16 "BSW1.5870.423601.3151.050.271.153/32 "BSW2.3810.529482.0411.70
16、30.3381.91/8 "BSW3.1750.635402.7682.3620.4062.5:5/32 "BSW3.9690.793323.4592.9520.5073.23/16 "BSW4.7621.058244.0843.4070.6773.77/32 "BSW5.5561.0581244.8784.2010.6774.511/4 "BSW6.351.27205.5374.7240.8135.15/16 "BSW7.9381.411187.0346.1310.9046.53/8 "BSW9.5251.5881168.
17、5097.4921.0177.97/16 "BSW11.1131.814149.9518.7891.1629.21/2 "BSW12.72.1171211.3459.991.35510.45/8 "BSW15.8762.30911114.39712.9181.47913.4 3/4 "BSW19.0512.541017.42415.7981.62716.257/8 "BSW22.2262.822920.41918.6111.80719.251"BSW25.43.175823.368121.3352.033221 1/8 "B
18、SW28.5763.629726.25323.9292.32424.51 1/4 "BSW31.
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