螺纹攻牙钻孔径对照表.xls

螺纹攻牙孔径对照表公制粗螺纹公制细螺纹美制粗螺纹针车用螺纹英制管螺纹规格标准径2级牙钻孔径规格标准径2级牙钻孔径规格
(UNC)标准径2级牙钻孔径规格标准径最大最小PF规格
(新规格G)标准径最大最小最大最小最大最小最大最小M27×3.024.0024.25223.752M28×1.526.5026.67626.376NO.1-64(1.854)1.551.5821.425SM1/16-801.251.2811.2111/16-286.76.8436.561M30×3.526.5026.77126.211M28×1.027.0027.15326.917NO.2-56(2.184)1.801.8711.695SM5/64-641.551.5931.5131/8-288.78.8488.566M30×3.027.0027.25226.752NO.3-48(2.515)2.102.1461.941SM3/32-561.91.9361.8411/4-1911.711.89011.445公制细螺纹M30×2.028.0028.21027.835NO.4-40(2.845)2.302.3852.157SM3/32-1002.12.1562.0813/8-1915.215.39514.950M30×1.528.5028.67628.376NO.5-40(3.175)2.602.6972.487SM1/8-322.3(2.393)(2.233)1/2-1419.019.17218.631规格标准径2级牙钻孔径M30×1.029.0029.15328.917NO.6-32(3.505)2.802.8952.642SM1/8-402.52.5512.4215/8-1421.021.12820.587最大最小M32×2.030.0030.1029.835NO.8-32(4.166)3.403.5303.302SM1/8-442.52.6052.4853/4-1424.524.65824.117M1.0×0.20.800.8210.783M32×1.530.5030.67660.376NO.10-24(4.826)3.903.9623.683SM1/8-482.62.6572.5477/8-1428.224.41827.877M1.1×0.20.900.9210.883M33×3.030.0030.25229.7521/4-205.105.2574.979SM9/64-322.7(2.790)(2.630)1-1130.630.93130.291M1.2×0.21.001.0210.983M33×2.031.0031.21030.8355/16-186.606.7316.401SM9/64-402.92.9482.81811/8-1135.235.57934.939M1.4×0.21.201.2211.183M33×1.531.5031.67631.3763/8-168.008.1537.798SM11/64-323.53.5843.42411/4-1139.239.59238.952M1.6×0.21.401.4211.383M35×1.533.5033.67633.3767/16-149.409.5509.144SM11/64-403.73.7423.61211/2-1145.045.48544.845M1.7×0.21.451.5001.460M36×3.033.0033.25232.7521/2-1310.9011.02310.592SM3/16-243.63.6583.49813/4-1151.051.42850.788M1.8×0.21.601.6211.583M36×2.034.0034.21033.8359/16-1212.2012.44611.989SM3/16-283.83.8443.6842-1157.057.29656.656M2.0×0.251.751.7851.729M36×1.534.5034.67634.3765/8-1113.6013.86813.386SM3/16-323.93.9803.820PT规格
新规格RC)标准径有效牙部之长度(最小)中之母螺牙内径标准长度(最小)中之母螺牙内径使用
绞刀时不用
绞刀时M2.2×0.251.951.9851.929美制细螺纹3/4-1016.6016.84016.307SM3/16-404.054.1384.008M2.3×0.252.052.0612.001规格
(UNF)标准径2级牙钻孔径7/8-919.06019.76119.177SM7/32-324.74.7744.6141/16-286.16.26.2446.384M2.5×0.352.202.2212.121最