螺丝,攻牙,孔径,对照表
螺丝攻牙钻孔底径对照表
螺丝 攻牙 钻孔 径和 滚造 径对 照表
时间:201003-02 16:18来源: 未知 作 者:admin 点击: 143 次
本表所推选之钻头孔径，是针对攻牙加工时，能够很容易的了解钻孔直径；而依抿市售之标 准钻头所选定的，在使用钻头的情况下，由于钻头的形状及尺寸、精度、被钻孔之材质等，对 于所钻孔的尺寸.
M1.0*0.2
0.8 0.821 0.783
M1.1*0.2
0.9 0.921 0.883
M1.2*0.2
1 1.021 0.983
M1.4*0.2
1.2 1.221 1.421 1.383
M1.7*0.2
1.45
1.5 1.46
M1.8*0.2
1.6 1.621 1.583
M3.0*0.5 0 M3.0*0.6 0 M3.5*0.6 0 M4.0*0.7 0 M4.0*0.7 5 M4.5*0.7 5 M5.0*0.8 0 M5.0*0.9 0 M6.0*1.0 0 M7.0*1.0 0 M8.0*1.2 5 M9.0*1.2 5 M10*1.50 M11*1.50 M12*1.75 M14*2.00 M16*2.00 M18*2.50 M20*2.50 M22*2.50 M24*3.00 M27*3.00 M30*3.50
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1/2 - 13
-
No 2 -
64UNF
No 3 - 56
4.9 4.96 -
5.72 -
7.24 -
8.74 8.81
10.2 10.3
11.27 11.82
螺丝攻牙孔径对照表
13.081 12.751
14.681 14.351
17.678 17.323
20.575 20.270
23.571 23.114
26.746 26.289
29.921 29.464
33.096 32.639
36.271 35.814
公制迫牙丝攻钻孔径
规格
M1.0*0.25 M1.1*0.25 M1.2*0.25 M1.4*0.30 M1.6*0.35 M1.7*0.35 M1.8*0.35 M2.0*0.40 M2.2*0.45 M2.3*0.40 M2.5*0.45 M2.6*0.45 M3.0*0.50 M3.5*0.60 M4.0*0.70 M5.0*0.80 M6.0*1.00 M7.0*1.00 M8.0*1.25 M10*1.50 M10*1.25 M12*1.75 M12*1.25
20.376 20.917 21.835 22.376 22.917 22.835 23.376 23.917
24.676 25.210 25.676 26.153 26.210 26.676 27.153 27.152 28.210 28.676 29.153 30.210
24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835
1.25 1.55 1.85 2.10 2.40 2.70 2.90 3.50 4.10 4.60 5.50 6.90 8.50 9.90 11.50 12.90 14.50 17.50 20.50 23.20 26.50 29.50 32.80 36.00
2级牙钻孔径
最大
螺丝攻牙孔径对照表
螺丝攻牙钻孔径对照表美制（粗）挤牙丝攻钻孔径公制挤牙丝攻钻孔径美制细牙螺纹公制粗牙螺纹公制细牙螺纹规格精度max min 规格精度max min 2-56UNC RH4 2.02 1.96M1.0 0.25RH40.920.90最大最小最大最小最大最小3-48RH4 2.32 2.25M1.1 0.25RH4 1.02 1.00螺丝牙外径M1.0 0.250.750.7850.729M7.0 0.506.50 6.550 6.4004-40RH5 2.60 2.52M1.2 0.25RH4 1.12 1.10No.0-80（1.524） 1.25 1.305 1.182M1.1 0.250.850.8850.829M8.0 1.007.007.153 6.9175-40RH5 2.93 2.86M1.4 0.30RH4 1.294 1.270No.1-72（1.854） 1.55 1.612 1.474M1.2 0.250.950.9850.929M8.0 0.757.307.3787.1886-32RH5 3.17 3.09M1.6 0.35RH4 1.45 1.40No.2-64（2.184） 1.85 1.912 1.756M1.4 0.30 1.10 1.142 1.075M8.0 0.507.507.5207.4008-32RH6 3.83 3.75M1.7 0.35RH4 1.58 1.54No.3-56（2.515） 2.10 2.197 2.025M1.6 0.35 1.25 1.321 1.221M9.0 1.008.008.1537.91710-24RH6 4.35 4.26M2.0 0.40RH4 1.85 1.81No.4-48（2.845） 2.40 2.458 2.271M1.7 0.35 1.35 1.421 1.321M9.0 0.758.308.3788.18812-24RH6 5.01 4.92M2.3 0.40RH4 2.15 2.11No.5-44（3.175） 2.70 2.740 2.551M1.8 0.35 1.45 1.521 1.421M10.0 1.258.808.9128.6471/4-20RH6 5.76 5.66M2.5 0.45RH4 2.33 2.28No.6-40（3.505） 2.90 3.022 2.820M2.0 0.40 1.60 1.679 1.567M10.0 1.009.009.1538.9175/16-18RH77.297.18M2.6 0.45RH4 2.43 2.38No.8-36（4.166） 3.50 3.606 3.404M2.2 0.45 1.75 1.838 1.713M10.0 0.759.309.3789.1883/8-16RH78.788.66M3.0 0.50RH5 2.81 2.76No.10-32（4.826） 4.10 4.165 3.963M2.3 0.40 1.90 1.979 1.867M10.0 0.509.509.5209.4007/16-14RH710.2510.11M3.5 0.60RH5 3.26 3.20No.12-28（5.486） 4.60 4.724 4.496M2.5 0.45 2.10 2.138 2.013M11.0 1.0010.0010.1539.9171/2-13RH811.7811.62M4.0 0.70RH6 3.70 3.651/4-28 5.50 5.588 5.360M2.6 0.45 2.20 2.238 2.113M11.0 0.7510.3010.37810.1889/16-12RH1013.2713.14M5.0 0.80RH6 4.66 4.595/16-24 6.907.035 6.782M3.0 0.50 2.50 2.599 2.459M12.0 1.5010.5010.67610.3765/8-11RH1114.7614.62M6.0 1.00RH7 5.57 5.483/8-248.508.6368.382M3.5 0.60 2.90 3.010 2.850M12.0 1.2510.8010.91210.6473/4-10RH1217.8817.67M7.0 1.00RH7 6.57 6.487/16-209.9010.0339.729M4.0 0.70 3.30 3.422 3.242M12.0 1.0011.0011.15310.9177/8-9RH1220.8520.68M8.0 1.00RH77.577.481/2-2011.5011.60711.329M4.5 0.75 3.80 3.878 3.688M12.0 0.5011.5011.52011.4001-8RH1323.8423.65M8.0 1.25RH77.417.349/16-1812.9013.08112.751M5.0 0.80 4.20 4.334 4.134M14.0 1.5012.5012.67612.376M10 1.00RH79.579.485/8-1814.5014.68114.351M6.0 1.00 5.00 5.153 4.917M14.0 1.0013.0013.15312.917美制（细）挤牙丝攻钻孔径M10 1.25RH79.419.343/4-1617.5017.67817.323M7.0 1.00 6.00 6.153 5.917M15.0 1.5013.5013.67613.376规格精度maxmin M10 1.50RH79.289.187/8-1420.5020.67520.270M8.0 1.25 6.80 6.912 6.647M15.0 1.0014.0014.15313.9172-64UNF RH3 2.04 1.98M12 1.00RH711.5711.181-1223.3023.57123.114M9.0 1.257.807.9127.647M16.0 1.5014.5014.67614.3763-56RH4 2.35 2.29M12 1.25RH711.4111.051-1/8-1226.5026.74626.289M10.0 1.508.508.6768.376M16.0 1.0015.0015.15314.9174-48RH4 2.64 2.57M12 1.50RH711.2811.481-1/4-1229.6029.92129.464M11.0 1.509.509.6769.376M17.0 1.5015.5015.67615.3765-44RH4 2.95 2.88M12 1.75RH811.1511.341-3/8-1232.8033.09632.639M12.0 1.7510.3010.44110.106M17.0 1.0016.0016.15315.9176-40RH5 3.26 3.19M14 1.50RH913.3013.211-1/2-1236.0036.27135.814M14.0 2.0012.0012.21011.835M18.0 2.0016.0016.21015.8358-36RH5 3.88 3.80M14 2.00RH1013.0412.92M16.0 2.0014.0014.21013.835M18.0 1.5016.5016.67616.37610-32RH5 4.48 4.41M16 1.50RH915.3015.21M18.0 2.5015.5015.74415.294M18.0 1.0017.0017.15316.91712-28RH5 5.08 5.00M16 2.00RH1015.0414.92M20.0 2.5017.5017.74417.294M20.0 2.0018.0018.21017.8351/4-28RH5 5.93 5.86M18 1.5RH1017.3117.22M22.0 2.5019.5019.74419.294M20.0 1.5018.5018.67618.3765/16-24RH67.467.38M18 2.5RH1116.7816.63M24.0 3.0021.0021.25220.752M20.0 1.0019.0019.15318.9173/8-24RH69.058.96M20 1.5RH1019.3119.22M27.0 3.0024.0024.25223.752M22.0 2.0020.0020.21019.8357/16-20RH710.5410.44M20 2.5RH1118.7818.63M30.0 3.5026.5026.77126.211M22.0 1.5020.5020.67620.3761/2-20RH712.1212.02M33.0 3.5029.5029.77129.211M22.0 1.0021.0021.15320.9179/16-18RH913.6613.55最大最小M36.0 4.0032.0032.27031.670M24.0 2.0022.0022.21021.8355/8-18RH915.2515.14螺丝牙外径M39.0 4.0035.0035.27034.670M24.0 1.5022.5022.67622.3763/4-16RH1018.3218.22 1. 外径-牙距¡0.45=下孔＜D-P¡0.45＞No.1-64（1.854） 1.55 1.582 1.425M24.0 1.0023.0023.15322.9177/8-14RH1121.3821.27 2. Dn=D-0.2P-0.00403?P?f1+0.0127?nNo.2-56（2.184） 1.80 1.871 1.695M25.0 2.0023.0023.21022.8351-12RH1224.4124.28＜例＞M3¡0.5RH6 2级母螺纹攻牙 咬合率90%No.3-48（2.515） 2.10 2.146 1.941M25.0 1.5023.5023.67623.376Dn=3-0.2¡0.5-0.00403¡0.5¡90+0.0127¡6No.4-40（2.845） 2.30 2.385 2.157最大最小M25.0 1.0024.0024.15323.917 =2.80No.5-40（3.175） 2.60 2.697 2.487M1.0 0.200.800.8210.783M26.0 1.5024.5024.67624.376山数山数Dn=下孔径 D=基准外径 P=牙距No.6-32（3.505） 2.80 2.895 2.642M1.1 0.200.900.9210.883M27.0 2.0025.0025.21024.835每25.4mm 每25.4mm f1=咬合率 n=RH 精度No.8-32（4.166） 3.40 3.530 3.302M1.2 0.20 1.00 1.0210.983M27.0 1.5025.5025.67625.3761000.254012 2.1167No.10-24（4.826） 3.90 3.962 3.683M1.4 0.20 1.20 1.221 1.183M27.0 1.0026.0026.15325.917800.317511 2.3091No.12-24（5.486） 4.50 4.597 4.344M1.6 0.20 1.40 1.421 1.383M28.0 2.0026.0026.21025.835720.352810 2.54001/4-20 5.10 5.257 4.979M1.7 0.20 1.50 1.521 1.483M28.0 1.5026.5026.67626.376640.39699 2.82225/16-18 6.60 6.731 6.401M1.8 0.20 1.60 1.621 1.583M28.0 1.0027.0027.15326.917600.42338 3.17503/8-168.008.1537.798M2.0 0.25 1.75 1.785 1.729M30.0 3.0027.0027.25226.752560.45367 3.62867/16-149.409.5509.144M2.2 0.25 1.95 1.985 1.929M30.0 2.0028.0028.21027.835480.52926 4.23331/2-1310.9011.02310.592M2.3 0.25 2.05 2.061 2.001M30.0 1.5028.5028.67628.376440.57735 5.0800规格吋mm 9/16-1212.2012.46611.989M2.5 0.35 2.20 2.221 2.121M30.0 1.0029.0029.15328.917400.63504 1/2 5.6444 No. 00.0600 1.5245/8-1113.6013.86813.386M2.6 0.35 2.20 2.246 2.186M32.0 2.0030.0030.21029.835360.70564 6.350010.0730 1.8543/4-1016.6016.84016.307M3.0 0.35 2.70 2.721 2.621M32.0 1.5030.5030.67630.376320.79383 1/27.257120.0860 2.1847/8-919.6019.76119.177M3.5 0.35 3.20 3.221 3.121M33.0 3.0030.0030.25229.752280.90713 1/47.815430.0990 2.5151-822.3022.60621.971M4.0 0.40 3.50 3.599 3.459M33.0 2.0031.0031.21030.83524 1.058338.466740.1120 2.8451-1/8-725.0025.34924.638M4.5 0.40 4.00 4.099 3.959M33.0 1.5031.5031.67631.37620 1.27002 7/88.834850.1250 3.1751-1/4-728.2028.52427.813M5.0 0.40 4.50 4.599 4.459M35.0 1.5033.5033.67633.37618 1.41112 3/49.236460.1380 3.5051-3/8-630.8031.11530.353M5.5 0.40 5.00 5.099 4.959M36.0 3.0033.0033.25232.75216 1.58752 5/89.676280.1640 4.1661-1/2-634.0034.29033.528M6.0 0.75 5.30 5.378 5.188M36.0 2.0034.0034.21033.83514 1.81432 1/210.1600100.1900 4.8261-3/4-539.5039.82738.964M6.0 0.50 5.50 5.550 5.400M36.0 1.5034.5034.67634.376131.9538120.21605.4862-4-1/245.2045.59344.679M7.0 0.756.306.3786.188美制螺丝外径公厘（mm ）换算表美制粗牙螺纹公制细牙螺纹规格标准径2级牙钻孔径NRT 下孔径计算式规格标准径2级牙钻孔径规格标准径2级牙钻孔径2级牙钻孔径规格标准径2级牙钻孔径牙距mm 牙距mm 规格标准径山数节距换算表。
螺丝攻牙钻孔径和滚丝径对照表
螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（UNC）标准径2级牙钻孔径最大最小最大最小M1.0×0.25 0.75 0.785 0.729NO.1-64(1.854) 1.55 1.582 1.425M1.1×0.25 0.85 0.885 0.829NO.2-56(2.184) 1.80 1.871 1.695M1.2×0.25 0.95 0.985 0.985NO.3-48(2.515) 2.10 2.146 1.941M1.4×0.3 1.10 1.142 1.075NO.4-40(2.845) 2.30 2.385 2.157M1.6×0.35 1.25 1.321 1.221NO.5-40(3.175) 2.60 2.697 2.487M1.7×0.35 1.35 1.421 1.321NO.6-32(3.505) 2.80 2.895 2.642M1.8×0.35 1.45 1.521 1.421NO8-32(4.166) 3.40 3.53 3.302M2.0×0.4 1.60 1.679 1.567NO.10-24(4.826) 3.90 3.962 3.683M2.2×0.45 1.75 1.838 1.713NO.12-24(5.486) 4.50 4.597 4.344M2.3×0.4 1.90 1.979 1.867 1/4-20 5.10 5.257 4.979M2.5×0.45 2.10 2.138 2.013 5/16-18 6.60 6.731 6.401M2.6×0.45 2.20 2.238 2.113 3/8-16 8.00 8.153 7.798M3.0×0.5 2.50 2.599 2.459 7/16-14 9.40 9.55 9.144M3.0×0.6 2.40 2.440 2.280 1/2-13 10.80 11.023 10.592M3.5×0.6 2.90 3.010 2.850 9/16-12 12.20 12.446 11.989M4.0×0.7 3.30 3.422 3.242 5/8-11 13.60 12.868 13.386M4.0×0.75 3.25 3.326 3.106 3/4-10 16.50 18.840 16.307M4.5×0.75 3.80 3.878 3.688 7/8-9 19.50 19.761 19.177M5.0×0.8 4.20 4.334 4.134 1 22.2022.606 21.971M5.0×0.9 4.10 4.170 3.930 1-1/8-7 25.00 25.349 24.638M6.0×1.0 5.00 5.153 4.917 1-1/4-7 28.20 28.524 27.813M7.0×1.0 6.00 6.153 5.917 1-3/8-6 30.80 31.115 30.353M8.0×1.25 6.80 6.912 6.647 1-1/2-6 34.00 34.290 33.528M9.0×1.25 7.80 7.912 7.647 1-3/4-5 39.50 39.827 38.964M10×1.5 8.50 8.676 8.376 2-4-1/2 45.20 45.593 44.679M11×1.5 9.50 9.676 9.376M12×1.75 10.30 10.441 10.106M14×2.0 12.00 12.210 11.835M16×2.0 14.00 14.210 13.835M18×2.5 15.50 15.744 15.294M20×2.5 17.50 17.744 17.294M22×2.5 19.50 19.744 19.294M24×3.0 21.00 21.252 20.752M27×3.0 24.00 24.252 23.752M30×3.5 26.50 26.771 26.211螺丝攻牙钻孔径和滚丝径对照表公制细螺纹美制细螺纹规格标准径2级牙钻孔径规格（UNC）标准径2级牙钻孔径最大最小最大最小M1.0×0.2 0.80 0.821 0.783 NO.0-80(1.524) 1.25 1.305 1.182M1.1×0.2 0.90 0.921 0.883 NO.1-72(1.854) 1.55 1.612 1.474M1.2×0.2 1.00 1.021 0.983 NO.2-64(2.184) 1.85 1.912 1.756M1.4×0.2 1.20 1.221 1.183 NO.3-56(2.515) 2.10 2.197 2.025M1.6×0.2 1.40 1.421 1.383 NO.4-48(2.845) 2.40 2.458 2.271M1.7×0.2 1.45 1.500 1.460NO.5-44(3.175) 2.70 2.740 2.551M1.8×0.2 1.60 1.621 1.583NO.6-40(3.505) 2.90 3.022 2.820M2.0×0.25 1.75 1.785 1.729NO.8-36(4.166) 3.50 3.606 3.404M2.2×0.25 1.95 1.985 1.929NO.10-32(4.826) 4.10 4.165 3.963M2.3×0.25 2.05 2.061 2.001NO.12-28(5.846) 4.60 4.724 4.496M2.5×0.35 2.20 2.221 2.121 1/4-28 5.50 5.588 5.360M2.6×0.35 2.20 2.246 2.186 5/16-24 6.90 7.035 6.782M3.0×0.35 2.70 2.721 2.621 3/8-24 8.50 8.636 8.382M3.5×0.35 3.20 3.221 3.121 7/16-20 9.90 10.033 9.729M4.0×0.5 3.50 3.599 3.459 1/2-20 11.50 11.607 11.329M4.5×0.5 4.00 4.099 3.959 9/16-18 12.90 13.081 12.751M5.0×0.5 4.50 4.599 4.459 5/8-18 14.50 14.681 14.351M5.5×0.5 5.00 5.099 4.959 3/4-16 17.50 17.678 17.323M6.0×0.75 5.30 5.378 5.188 7/8-14 20.50 20.675 20.270M6.0×0.5 5.50 5.550 5.400 1-12 23.20 23.571 23.114M7.0×0.75 6.30 6.378 6.188 1-1/8-12 26.50 26.746 26.289M7.0×0.5 6.50 6.550 6.400 1-1/4-1229.50 29.921 29.464M8.0×1.0 7.00 7.153 6.917 1-3/8-12 32.80 33.096 32.639M8.0×0.75 7.30 7.378 7.188 1-1/2-12 36.00 36.271 35.814M8.0×0.5 7.50 7.520 7.400M9.0×1.0 8.00 8.153 7.917M9.0×0.75 8.30 8.378 8.188M10×1.25 8.80 8.912 8.647M10×1.0 9.00 9.153 8.917M10×0.75 9.30 9.378 9.188M10×0.5 9.50 9.520 9.400M11×1.0 10.00 10.153 9.917M11×0.75 10.30 10.378 10.188M12×1.5 10.50 10.676 10.376M12×1.25 10.80 10.912 10.647M12×0.5 11.50 11.520 11.400 M14×1.5 12.50 12.676 12.376 M14×1.0 13.00 13.153 12.917 M15×1.5 13.50 13.676 13.376 M15×1.0 14.00 14.153 13.917 M16×1.5 14.50 14.676 14.376 M16×1.0 15.00 15.153 14.917 M17×1.5 15.50 15.676 15.376 M17×1.0 16.00 16.153 15.917 M18×2.0 16.00 16.210 15.835 M18×1.5 16.50 16.676 16.376 M18×1.0 17.00 17.153 16.917 M20×2.0 18.00 18.210 17.835 M20×1.5 18.50 18.676 18.376 M20×1.0 19.00 19.153 18.917 M22×2.0 20.00 20.210 19.835 M22×1.5 20.50 20.676 20.376 M22×1.0 21.00 21.153 20.917M24×1.5 22.50 22.676 22.376 M24×1.0 23.00 23.153 22.917 M25×2.0 23.00 23.210 22.835 M25×1.5 23.50 23.676 23.376 M25×1.0 24.00 24.153 23.917 M26×1.5 24.50 24.676 24.376 M27×2.0 25.00 25.210 24.835 M27×1.5 25.50 25.676 25.376 M27×1.0 26.00 26.153 25.917 M28×2.0 26.00 26.210 25.835 M28×1.5 26.50 26.676 26.376 M28×1.0 27.00 27.153 26.917 M30×3.0 27.00 27.252 26.752 M30×2.0 28.00 28.210 27.835 M30×1.5 28.50 28.676 28.376 M30×1.0 29.00 29.153 28.917 M32×2.0 30.00 30.210 29.835 M32×1.5 30.50 30.676 30.376M33×3.0 30.00 30.252 29.752M33×2.0 31.00 31.210 30.835M33×1.5 31.50 31.676 31.376M35×1.5 33.50 33.676 33.376M36×3.0 33.00 33.252 32.752M36×2.0 34.00 34.210 33.835M36×1.5 34.50 34.676 34.376螺丝攻牙钻孔径和滚丝径对照表公制挤压丝攻钻孔径美制挤压丝攻钻孔径规格精度等级规格（UNC）精度等级G4-G6 G7-G8 G9 G4-G6 G7-G8 G9M1.0×0.25 0.86 0.88 －NO.2-56UNC 1.94 －－M1.1×0.25 0.96 0.98 －NO.3-48 2.23 －－M1.2×0.25 1.06 1.08 －NO.4-40 2.50 －－M1.4×0.3 1.24 1.25 －NO.5-40 2.83 －－M1.6×0.35 1.41 1.43 －NO.6-32 3.07 －－－M1.8×0.35 1.61 1.63 －NO.10-24 4.24 4.3 －M2.0×0.4 1.78 1.80 －NO.12-24 4.90 4.96 －M2.2×0.45 1.95 1.98 －1/4-20 －5.72 －M2.3×0.4 2.08 2.10 －5/16-18 －7.24 －M2.5×0.45 2.25 2.28 －3/8-16 －8.74 8.81 M2.6×0.45 2.35 2.38 －7/16-14 －10.20 10.30M3.0×0.5 2.73 2.75 －1/2-13 －11.27 11.82M3.5×0.6 3.17 3.20 －NO.2-64UNF 1.97－－M4.0×0.7 3.62 3.65 3.69 NO.3-56 2.27 －－M5.0×0.8 4.56 4.60 4.64 NO.4-48 2.56 －－－M7.0×1.0 6.45 6.50 6.55 NO.6-40 3.16 －－M8.0×1.25 7.31 7.38 7.44 NO.8-36 3.78 －－M10×1.5 9.18 9.25 9.32 NO.10-32 4.394.43 －M10×1.25 9.31 9.38 9.44 NO.12-28 4.99 5.04 －M12×1.75 11.04 11.12 11.21 1/4-28 5.85 5.90 －M12×1.25 11.31 11.38 11.44 5/16-24 7.36 7.41 －3/8-24 －9.00 －7/16-20 －10.48 10.541/2-20 －12.07 12.13美制特细螺纹英制电器螺纹规格标准径2级牙钻孔径规格钻孔径最大最小NO.12-32 4.70 4.826 4.623 2BA 4.0-4.2 1/4 -32 5.60 5.690 5.486 3BA5/16 -32 7.10 7.264 7.087 4BA 3.0-3.2 3/8 -32 8.70 8.865 8.661 5BA 2.7-2.8 7/16 -28 10.20 10.338 10.135 6BA 2.4-2.51/2 -28 11.80 11.938 11.7099/16 -24 13.20 13.386 13.1325/8 -24 14.80 14.986 14.7323/4 -20 17.80 17.958 17.6787/8 -20 21.00 21.133 20.8531 -20 24.00 24.308 24.028螺丝攻牙钻孔径和滚丝径对照表英制螺纹公制螺纹针车用螺纹规格(UNEF) 钻孔径规格滚丝径规格滚丝径硬材软材W 1/8 - 40 2.65 2.60 M3×0.5 2.63-2.60SM1/8-40 2.735-2.688W 5/32 - 32 3.25 3.20 M3.0×0.6 2.56-2.53 SM1/8-44 2.769-2.722W 3/16 - 24 3.75 3.70 M3.5×0.6 3.06-3.03 SM9/64-40 3.128-3.083W 1/4 - 20 5.10 5.00 M4.0×0.7 3.49-3.45 SM11/64-40 3.855-3.805W 5/16 - 18 6.60 6.50 M4.0×0.75 3.45-3.41 SM3/16-32 4.205-4.155W 3/8 - 16 8.00 7.90 M4.5×0.75 3.96-3.92 SM3/16-28 4.143-4.093W 7/16 - 14 9.40 9.30 M5.0×0.8 4.43-4.38 SM7/32-32 5.003-4.955W 1/2 - 12 10.70 10.50 M5.0×0.9 4.36-4.31 SM15/64-28 5.325-5.570W 9/16 - 12 12.30 12.00 M6.0×1.05.30-5.25 SM1/4-40 5.890-5.735W 5/8 - 11 13.70 13.50 M7.0×1.0 6.30-6.25 SM1/4-28 5.721-5.366W 3/4 - 10 16.70 16.50 M8.0×1.0 7.28-7.23 SM9/32-28 6.508-6.648W 7/8 - 9 19.50 19.30 M8.0×1.25 7.12-7.07 SM11/32-28 8.092-8.432W1 - 8 22.40 22.00 SM3/8-288.880-8.015W 1-1/8 - 7 25.00 24.80 SM7/16-28 10.466-10.401W 1 - 1/4 - 7 28.30 28.00 SM7/16-16 10.037-9.967SM1/2-20 11.819-11.749SM9/26-20 13.400-13.425英制管螺纹英制管螺纹美制管螺纹规格标准径钻孔径规格标准径有交牙部之长度（最小）中之毋螺牙内径标准长度（最小）中之毋螺牙内径规格钻孔径最大最小使用绞刀时不用绞刀时NPT NPS 使用绞刀时不用绞刀时PS 1/16 - 28 6.50 6.632 6.490 PT 1/16 - 28 6.10 6.20 6.244 6.384 1/16 - 27 6.10 6.25 6.35PS 1/8 - 28 8.50 8.637 8.495 PT 1/8 - 28 8.10 8.20 8.249 8.388 1/8 - 27 8.33 8.43 8.74PS 1/4 - 19 11.40 11.549 11.341 PT 1/4 - 19 10.70 11.00 10.962 11.174 1/4 - 18 10.72 11.13 11.13PS 3/8 - 19 15.00 15.054 14.846 PT 3/8 - 19 14.20 14.50 14.448 14.658 3/8 - 18 14.27 14.27 14.68PS 1/2 - 14 18.50 18.773 18.489 PT 1/2 - 14 17.60 18.00 17.979 18.263 1/2 - 14 17.48 17.86 18.26PS 3/4 -14 24.00 24.259 23.975 PT 3/4 - 14 23.00 23.50 23.378 23.663 3/4 - 14 22.63 23.01 23.42PS 1 - 11 30.20 30.471 30.111 PT 1- 11 29.00 29.50 29.459 29.822 1 - 11-1/2 28.58 28.98 29.36PS 1-1/4 - 11 38.80 39.132 38.772 PT 1-1/4 - 11 37.50 38.00 37.976 38.3391-1/4-11-1/2 37.31 37.69 38.10PS 1-1/2 - 11 44.80 45.025 44.665 PT 1-1/2 - 11 43.40 44.00 43.869 44.2321-1/2-11-1/2 43.66 44.04 44.45PS 2 - 11 56.50 56.836 56.476 PT 2 - 11 54.90 55.50 55.412 55.844 2 - 11 - 1/2 55.58 55.96 56.36。
螺纹攻牙-钻孔直径对照表
M4.5*0.5 4.00 4.099 3.959 NO.4-48(2.845) 2.40 2.458 2.271
M5.0*0.5 4.50 4.599 4.459 NO.5-44(3.175) 2.70 2.740 2.551
M5.5*0.5 5.00 5.099 4.959 NO.6-40(3.505) 2.90 3.022 2.820
5/8 - 18
14.50 14.681 14.351
M10*1.0 9.00 9.153 8.917
3/4 - 16
17.50 17.678 17.323
M10*0.75 9.30 9.378 9.188
7/8 - 14
20.50 20.675 20.270
M10*0.5 9.50 8.520 9.400
M7.0*1.0
6.45 6.50
6.55
M8.0*1.25
7.31 7.38
7.44
M10*1.5
9.18 9.25
9.32
M10*1.25
9.31 9.38
9.44
M12*1.75
11.04 11.12 11.21
M12*1.25
11.31 11.38 11.44
美制迫牙丝攻钻孔径
规格 NO. 2-56UNC
7/16 - 20
9.90 10.033 9.729
M9.0*1.0 8.00 8.153 7.917
1/2 - 20
11.50 11.607 11.329
M9.0*0.75 8.30 8.378 8.188
3/16 - 18
12.90 13.081 12.751
M10*1.25 8.80 8.912 8.647
螺丝攻牙钻孔径和滚造径对照表
本表所推选之钻头孔径，是针对攻牙加工时，能够很容易的了解钻孔直径；而依据市售之标准钻头所选定的。在使用钻头的情况下，由于钻头的形状及尺寸、精度、被钻孔之材质等，对于所钻孔的尺寸、 精度有很大的影响，所以使用本表之钻孔径，若有不当之处，应视实际状况适当的变更钻头直径。本表是依据2级牙制订。
英制锥管螺纹
标 6.10 8.10 10.70 14.20 17.60 23.00 29.00 37.50 43.40 54.90 准 径 6.20 8.20 11.00 14.50 18.00 23.50 29.50 38.00 44.00 55.50
No.10－ 32 No.12－ 28 1/4 5/16 3/8 7/16 1/2
PS 1/16 － 28 PS 1/8 PS 1/4 PS 3/8 PS 1/2 PS 3/4 PS 1 － 28 － 19 － 19 － 14 － 14 － 11
－ 28 5.72 － 5.68 － 24 7.20 － 7.16 － 24 8.79 － 8.74 － 20 10.23－10.18 － 20 11.82－11.76
公 制 细 螺 纹
格 标准径 11.00 11.50 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.00 16.50 17.00 18.00 18.50 19.00 20.00 20.50 21.00 22.00 22.50 23.00 23.00 23.50 24.00 24.50 25.00 25.50 26.00 26.00 26.50 27.00 27.00 28.00 28.50 29.00 30.00 30.50 30.00 31.00 31.50 33.50 33.00 34.00 34.50 2级牙钻孔径 最 大 11.153 11.520 12.676 13.153 13.676 14.153 14.676 15.153 15.676 16.153 16.210 16.676 17.153 18.210 18.676 19.153 20.210 20.676 21.153 22.210 22.676 23.153 23.210 23.676 24.153 24.676 25.210 25.676 26.153 26.210 26.676 27.153 27.252 28.210 28.676 29.153 30.210 30.676 30.252 31.210 31.676 33.676 33.252 34.210 34.676 最 小 10.917 11.400 12.376 12.917 13.376 13.917 14.376 14.917 15.376 15.917 15.835 16.376 16.917 17.835 18.376 18.917 19.835 20.376 20.917 21.835 22.376 22.917 22.835 23.376 23.917 24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835 30.376 29.752 30.835 31.376 33.376 32.752 33.835 34.376 M12×1.00 M12×0.50 M14×1.50 M14×1.00 M15×1.50 M15×1.00 M16×1.50 M16×1.00 M17×1.50 M17×1.00 M18×2.00 M18×1.50 M18×1.00 M20×2.00 M20×1.50 M20×1.00 M22×2.00 M22×1.50 M22×1.00 M24×2.00 M24×1.50 M24×1.00 M25×2.00 M25×1.50 M25×1.00 M26×1.50 M27×2.00 M27×1.50 M27×1.00 M28×2.00 M28×1.50 M28×1.00 M30×3.00 M30×2.00 M30×1.50 M30×1.00 M32×2.00 M32×1.50 M33×3.00 M33×2.00 M33×1.50 M35×1.50 M36×3.00 M36×2.00 M36×1.50 最 小 0.783 0.883 0.983 1.183 1.383 1.460 1.583 1.729 1.929 2.001 2.121 2.186 2.621 3.121 3.459 3.959 4.459 4.959 5.188 5.400 6.188 6.400 6.917 7.188 7.400 7.917 8.188 8.647 8.917 9.188 9.400 9.917 10.188 10.376 10.647
机加工螺纹攻牙钻孔直径对照表
机加工螺纹攻牙钻孔直径对照表螺纹攻牙钻孔直径对照表：公制粗螺纹规格标准径2级牙钻孔径最大最小M1.0×0.250.75 0.785 0.729 M1.1×0.250.85 0.885 0.829 M1.2×0.250.95 0.985 0.929 M1.4×0.3 1.10 1.142 1.075 M1.6×0.35 1.25 1.321 1.221 M1.7×0.35 1.35 1.421 1.321 M1.8×0.35 1.45 1.521 1.421 M2.0×0.4 1.60 1.679 1.567 M2.2×0.45 1.75 1.838 1.713 M2.3×0.4 1.90 1.979 1.867 M2.5×0.45 2.10 2.138 2.013 M2.6×0.45 2.20 2.238 2.113 M3.0×0.5 2.50 2.599 2.459 M3.0×0.6 2.40 2.44 2.280 M3.5×0.6 2.90 3.010 2.850 M4.0×0.7 3.30 3.422 3.242 M4.0×0.75 3.25 3.326 3.106 M4.5×0.75 3.80 3.878 3.688 M5.0×0.8 4.20 4.334 4.134 M5.0×0.9 4.10 4.170 3.930 M6.0×1.0 5.00 5.153 4.917 M7.0×1.0 6.00 6.153 5.917 M8.0×1.25 6.80 6.912 6.647 M9.0×1.257.80 7.912 7.647 M10×1.58.50 8.676 8.376 M11×1.59.50 9.676 9.376 M12×1.7510.30 10.441 10.106 M14×2.012.00 12.210 11.735 M16×2.014.00 14.210 13.835 M18×2.515.50 15.744 15.294 M20×2.517.50 17.744 17.294M22×2.519.50 19.744 19.294 M24×3.021.00 21.252 20.752 M27×3.024.00 24.252 23.752 M30×3.526.50 26.771 26.211 公制细螺纹规格标准径2级牙钻孔径最大最小M1.0×0.20.80 0.821 0.783 M1.1×0.20.90 0.921 0.883 M1.2×0.2 1.00 1.021 0.983 M1.4×0.2 1.20 1.221 0.183 M1.6×0.2 1.40 1.421 1.383 M1.7×0.2 1.45 1.500 1.460 M1.8×0.2 1.60 1.621 1.583 M2.0×0.25 1.75 1.785 1.729 M2.2×0.25 1.95 1.985 1.929 M2.3×0.25 2.05 2.061 2.001 M2.5×0.35 2.20 2.221 2.121 M2.6×0.35 2.20 2.246 2.186 M3.0×0.35 2.70 2.721 2.621 M3.5×0.35 3.20 3.221 3.121 M4.0×0.5 3.50 3.599 3.459 M4.5×0.5 4.00 4.099 3.959 M5×0.5 4.50 4.599 4.459 M5.5×0.5 5.00 5.099 4.959 M6.0×0.75 5.30 5.378 5.188 M6.0×0.5 5.50 5.550 5.400 M7.0×0.75 6.30 6.378 61.88 M7.0×0.5 6.50 6.550 64.00 M8.0×1.07.00 7.153 6.917 M8.0×0.757.30 7.378 7.188 M8×0.57.50 7.520 7.400 M9×1.08.00 8.153 7.917 M9×0.758.30 8.378 8.188 M10×1.258.80 8.912 8.647 M10×1.09.00 9.153 8.917 M10×0.759.30 9.378 9.188M11×1.010.00 10.153 9.917 M11×0.7510.30 10.378 10.188 M11×1.510.50 10.676 10.376 M12×1.2510.80 10.912 10.647 公制细螺纹规格标准径2级牙钻孔径最大最小M12×1.011.00 11.153 10.917 M12×0.511.50 11.520 11.4 M14×1.512.50 12.676 12.376 M14×1.013.00 13.153 12.917 M15×1.513.50 13.676 13.376 M15×1.014.00 14.153 13.917 M16×1.514.50 14.676 14.376 M16×1.015.00 15.153 14.917 M17×1.515.50 15.676 15.376 M17×1.016.00 16.153 15.917 M18×2.016.00 16.210 15.835 M18×1.516.50 16.670 16.376 M18×1.017.00 17.153 16.917 M20×2.018.00 18.210 17.835 M20×1.518.50 18.676 18.376 M20×1.019.00 19.153 18.917 M20×2.020.00 20.210 19.835 M22×1.520.50 20.676 20.376 M22×1.021.00 21.153 20.917 M24×2.022.00 22.210 21.835 M24×1.522.50 22.676 22.376 M24×1.023.00 23.153 22.917 M25×2.023.00 23.210 22.835 M25×1.523.50 23.676 23.376 M25×1.024.00 24.153 23.917 M26×1.524.50 24.676 24.376 M27×2.025.00 25.210 24.835 M27×1.525.50 25.676 25.376 M27×1.026.00 26.153 25.917M28×1.526.50 26.676 26.376 M28×1.027.00 27.153 26.917 M30×3.027.00 27.252 26.752 M30×2.028.00 28.210 27.835 M30×1.528.50 28.676 28.376 M30×1.029.00 29.153 28.917 M32×2.030.00 30.210 29.835 M32×1.530.50 30.676 30.376 M33×3.030.00 30.252 29.752 M33×2.031.00 31.210 30.835 M33×1.531.50 31.376 31.376 M35×1.533.50 33.676 33.376 M36×3.033.00 33.252 32.752 M36×2.034.00 34.210 33.835 M36×1.534.50 34.676 34.376 美制细螺纹规格(UNF) 标准径2级牙钻孔径最大最小番数牙外径NO.0-80(1.524) 1.25 1.305 1.182 NO.1-72(1.854) 1.55 1.612 1.474 NO.2-64(2.184) 1.85 1.912 1.756 NO.3-56(2.515) 2.10 2.197 2.025 NO.4-48(2.845) 2.40 2.458 2.271 NO.5-44(3.175) 2.70 2.740 2.551 NO.6-40(3.505) 2.90 3.022 2.820 NO.8-36(4.166) 3.50 3.606 3.404 NO.10-32(4.826) 4.10 4.165 3.963 NO.12-28(5.846) 4.60 4.724 4.496 1/4 -28 5.50 5.588 5.360 5/16 -24 6.90 7.035 6.782 3/8 -24 8.50 8.636 8.382 7/16 -20 9.90 10.033 9.729 1/2 -20 11.50 11.607 11.329 9/16 -18 12.90 13.081 12.751 5/8 -18 14.50 14.681 14.3513/4 -16 17.50 14.678 17.323 7/8 -14 20.50 20.675 20.270 1 -12 23.20 23.571 23.114 1-1/8 -12 26.50 26.746 26.289 1-1/4 -12 29.50 29.921 29.464 1-3/8 -12 32.80 33.096 32.464 1-1/2 -12 36.00 36.270 35.814 无屑丝攻钻孔径规格精度等级RH4.5.6 RH7.8 RH9M1.0×0.250.86 0.88 -M1.1×0.250.96 0.98 -M1.2×0.25 1.06 1.08 -M1.4×0.3 1.24 1.25 -M1.6×0.35 1.41 1.43 -M1.7×0.35 1.51 1.53 -M1.8×0.35 1.61 1.63 -M2.0×0.4 1.78 1.80 -M2.2×0.45 1.95 1.98 -M2.3×0.4 2.08 2.10 -M2.5×0.45 2.25 2.28 -M2.6×0.45 2.35 1.38 -M3.0×0.5 2.73 2.75 -M3.0×0.6 3.17 3.20 -M4.0×0.7 3.62 3.65 3.69 M5.0×0.8 4.56 4.60 4.64 M6.0×1.0 5.45 5.50 5.55 M7.0×1.0 6.45 6.50 6.55 M8.0×1.257.31 7.38 7.44 M10×1.59.18 9.25 9.32 M10×1.259.31 9.38 9.44 M12×1.7511.04 11.12 11.21 M12×1.2511.31 11.38 11.44 美制管螺纹规格(UNEF) 标准径2级牙钻孔径最大最小NO.12 -32 4.70 4.826 4.6231/4 -32 5.60 5.690 5.486 5/16 -32 7.10 7.264 7.087 3/8 -32 8.70 8.865 8.661 7/16 -28 10.20 10.338 10.135 1/2 -28 11.80 11.938 11.709 9/16 -28 13.20 13.386 13.132 5/8 -24 14.80 14.986 14.732 3/4 -20 17.80 17.958 17.678 7/8 -20 21.00 21.133 20.853 1 -20 24.00 24.308 24.028 美制粗螺纹规格(UNC) 标准径2级牙钻孔径番数牙外径最大最小NO.1-64(1.854) 1.55 1.582 1.425 NO.2-56(2.184) 1.80 1.871 1.695 NO.3-48(2.515) 2.10 2.146 1.941 NO.4-40(2.845) 2.30 2.385 2.157 NO.5-40(3.175) 2.60 2.697 2.487 NO.6-32(3.505) 2.80 2.895 2.642 NO.8-32(4.166) 3.40 3.530 3.302 NO.10-24(4.826) 3.90 3.962 3.682 NO.12-24(5.846) 4.50 4.597 4.344 1/4 -20 5.10 5.257 4.979 5/16 -18 6.60 6.731 6.401 3/8 -16 8.00 8.153 7.987 7/16 -14 9.40 9.500 9.144 1/2 -13 10.80 11.023 10.592 9/16 -12 12.20 12.446 11.989 5/8 -11 13.60 12.868 13.386 3/4 -10 16.20 16.840 16.307 7/8 -9 19.50 19.761 19.177 1 -8 22.20 22.606 21.971 1-1/8 -7 25.00 25.349 24.638 1-1/4 -7 28.20 28.524 27.813 1-3/8 -6 30.80 31.115 30.353 1-1/2 -6 34.00 34.290 33.528 1-3/4 -5 39.50 39.827 38.9642 -4-1/2 45.20 45.593 44.679 英制螺纹规格钻孔径硬材软材W1/8 - 40 2.65 2.60W5/32 - 32 3.25 3.20W3/16 - 24 3.75 3.70W1/4 - 20 5.10 5.00W5/16 - 18 6.60 6.50W3/8 - 16 8.00 7.90W7/16 - 14 9.40 9.30W1/2 - 12 10.70 10.50W9/16 - 12 12.30 12.00W5/8 - 11 13.70 13.50W3/4 - 10 16.70 16.50W7/8 - 9 19.50 19.30W1 - 8 22.40 22.00W1-1/8 - 7 25.00 24.80W1-1/4 - 7 28.30 28.00英制管螺纹规格标准径钻孔径最大最小PS1/16 -28 6.50 6.632 6.490PS1/8 -28 8.50 8.637 8.495PS1/4 - 19 11.40 11.549 11.341PS3/8 - 19 15.00 15.054 14.846PS1/2 - 14 18.50 18.773 18.489PS3/4 - 14 24.00 24.259 23.975PS1 - 11 30.20 30.471 30.111PS1-1/4 -11 38.80 39.132 38.772PS1-1/2 -11 44.80 45.025 44.665PS2 - 11 56.50 56.836 56.476英制管螺纹规格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PT1/16 -28 6.10 6.2 6.244 6.384 PT1/8 -28 8.10 8.2 8.249 8.388 PT1/4 -19 10.70 11 10.962 11.174 PT3/8 -19 14.20 14.5 14.448 14.658 PT1/2 -14 17.60 18 17.979 18.263 PT3/4 -14 23.00 23.5 23.378 23.663 Pt1 -11 29.00 29.5 29.459 29.822 PT1-1/4 -11 37.50 38 37.976 38.339 PT1-1/2 -11 43.40 44 43.869 44.232 Pt2 -11 54.90 55.5 55.412 55.844 美制螺纹滚造径规格钻孔径NPT NPS使用绞刀时不用绞刀时1/16 -27 6.1 6.25 6.351/8 -27 8.33 8.43 8.741/4 -18 10.72 11.13 11.133/8 -18 14.27 14.27 14.681/2 -14 17.48 17.86 18.263/4 -14 22.63 23.01 23.421 -11-1/2 28.58 28.98 29.361-1/4-11-1/2 37.31 37.69 38.11-1/2-11-1/2 43.66 44.04 44.452 -11-1/2 55.58 55.96 56.36英制螺纹滚造径规格滚造径W 3/16 - 24 4.08 - 4.05W 1/4 - 20 5.51 - 5.46W 5/16 - 18 7.01 - 6.95W 3/8 - 16 8.48 - 8.41W 7/16 - 14 9.92 - 9.85W 1/2 - 12 11.31 - 11.24W 9/16 -12 12.89 - 12.82公制螺纹规格滚造径M3.0×0.6 2.56 2.53M3.5×0.6 3.06 3.03M4.0×0.7 3.49 3.45M4.0×0.75 3.45 3.41M4.5×0.75 3.96 3.92M5.0×0.8 4.43 4.38M5.0×0.9 4.36 4.31M6.0×1.0 5.30 5.25M7.0×1.0 6.30 6.25M8.0×1.07.28 - 7.23M8.0×1.257.12 - 7.07M9.0×1.258.12 - 8.07M10×1.259.10 - 9.04M10×1.58.97 - 8.91M11×1.59.97 - 9.91M12×1.510.92 - 10.87 M12×1.7510.79 - 10.73 M14×2.012.63 - 12.56 M16×2.014.63 - 14.56 M18×2.516.31 - 16.23 M20×2.518.31 - 18.23 M22×2.520.31 - 20.23 针车用螺纹规格(UNC) 滚造径SM 1/8 40 2.735 -2.688 SM 1/8 44 2.769 -2.722 SM 9/64 40 3.128 -3.083 SM 11/64 40 3.855 -3.805 SM 3/16 32 4.205 -4.155 SM 3/16 28 4.143 -4.093 SM 7/32 32 5.003 -4.955 SM 15/64 28 5.325 -4.955 SM 1/4 40 5.890 -5.735 SM 1/4 28 5.721 -5.366 SM 9/32 28 6.528 -6.648 SM 11/32 28 8.092 -8.432 SM 3/8 29 8.880 -8.015 SM 7/16 30 10.466 -10.401 SM 7/16 16 10.037 -9.967SM 1/2 20 11.819 -11.749 SM 9/16 20 13.400 -13.425 美制粗螺纹规格(UNC) 滚造径NO.5-40 2.70 - 2.67 NO.6-32 2.95 - 2.91 NO.8-32 3.60 - 3.57 NO.10-24 4.09 - 4.05 NO.12-24 4.75 - 4.701/4 -20 5.50 - 5.455/16 -18 6.98 - 6.933/8 -16 8.45 - 8.407/16 -14 9.89 - 9.831/2 -13 11.39 - 11.32 9/16 -12 12.87 - 12.80 美制细螺纹规格(UNF) 滚造径NO.5-44 2.73 - 2.70 NO.6-40 3.05 - 3.02 NO.8-36 3.66 - 3.63 NO.10-32 4.26 - 4.80 NO.12-28 4.84 - 4.801/4 -28 5.72 - 5.685/16 -24 7.20 - 7.163/8 -24 8.79 - 8.747/16 -20 10.23 - 10.18 1/2 -20 11.82 - 11.76。
螺丝攻牙钻孔底径对照表
23 23.21 22.835
23.5
24 24.5
25 25.5
26 26 26.5 27 27 28 28.5 29 30 30.5 30 31 31.5 33.5 33 34 34.5
23.676
24.153 24.676 25.21 25.676 26.153 26.21 26.676 27.153 27.152 28.21 28.676 29.153 30.21 30.676 30.252 31.21 31.676 33.676 33.252 34.21 34.676
M25*1.5
M25*1.0 M26*1.5 M27*2.0 M27*1.5 M27*1.0 M28*2.0 M28*1.5 M28*1.0 M30*3.0 M30*2.0 M30*1.5 M30*1.0 M32*2.0 M32*1.5 M33*1.0 M33*2.0 M33*1.5 M35*1.5 M36*3.0 M36*2.0 M36*1.5
公制粗螺纹
规格
标准径
2级牙钻孔径
最大
最小
M1.0*0.2 5
0.75 0.785 0.729
M1.1*0.2 5
0.85 0.885 0.829
M1.2*0.2 5
0.95 0.985 0.929
M1.4*0.3 0
1 1.142 1.075
M1.6*0.3 5
1.25 1.321 1.221
M1.7*0.3 5
美制细螺纹
规格(UNF)
标准径
2级牙钻孔径
M2.5*0.3 5 M2.6*0.3 5 M3.0*0.3 5 M3.5*0.3 5
M4.0*0.5
2.2 2.221 2.121 2.2 2.246 2.186 2.7 2.721 2.621 3.2 3.221 3.121 3.5 3.599 3.459
螺丝攻牙钻孔径和滚丝径对照表
螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹 2 级牙钻孔径 规格 M1.0× 0.25 M1.1× 0.25 M1.2× 0.25 M1.4× 0.3 M1.6× 0.35 M1.7× 0.35 M1.8× 0.35 M2.0× 0.4 M2.2× 0.45 M2.3× 0.4 M2.5× 0.45 M2.6× 0.45 M3.0× 0.5 M3.0× 0.6 M3.5× 0.6 M4.0× 0.7 M4.0× 0.75 标准径 最大 0.75 0.85 0.95 1.10 1.25 1.35 1.45 1.60 1.75 1.90 2.10 2.20 2.50 2.40 2.90 3.30 3.25 0.785 0.885 0.985 1.142 1.321 1.421 1.521 1.679 1.838 1.979 2.138 2.238 2.599 2.440 3.010 3.422 3.326 最小 0.729 0.829 0.985 1.075 1.221 1.321 1.421 1.567 1.713 1.867 2.013 2.113 2.459 2.280 2.850 3.242 3.106 NO.1-64(1.854) NO.2-56(2.184) NO.3-48(2.515) NO.4-40(2.845) NO.5-40(3.175) NO.6-32(3.505) NO8-32(4.166) NO.10-24(4.826) NO.12-24(5.486) 1/4-20 5/16-18 3/8-16 7/16-14 1/2-13 9/16-12 5/8-11 3/4-101美制粗螺纹 2 级牙钻孔径 规格（UNC） 标准径 最大 1.55 1.80 2.10 2.30 2.60 2.80 3.40 3.90 4.50 5.10 6.60 8.00 9.40 10.80 12.20 13.60 16.50 1.582 1.871 2.146 2.385 2.697 2.895 3.53 3.962 4.597 5.257 6.731 8.153 9.55 11.023 12.446 12.868 18.840 最小 1.425 1.695 1.941 2.157 2.487 2.642 3.302 3.683 4.344 4.979 6.401 7.798 9.144 10.592 11.989 13.386 16.307M4.5× 0.75 M5.0× 0.8 M5.0× 0.9 M6.0× 1.0 M7.0× 1.0 M8.0× 1.25 M9.0× 1.25 M10× 1.5 M11× 1.5 M12× 1.75 M14× 2.0 M16× 2.0 M18× 2.5 M20× 2.5 M22× 2.5 M24× 3.0 M27× 3.0 M30× 3.5签名档：3.80 4.20 4.10 5.00 6.00 6.80 7.80 8.50 9.50 10.30 12.00 14.00 15.50 17.50 19.50 21.00 24.00 26.503.878 4.334 4.170 5.153 6.153 6.912 7.912 8.676 9.676 10.441 12.210 14.210 15.744 17.744 19.744 21.252 24.252 26.7713.688 4.134 3.930 4.917 5.917 6.647 7.647 8.376 9.376 10.106 11.835 13.835 15.294 17.294 19.294 20.752 23.752 26.2117/8-9 1 1-1/8-7 1-1/4-7 1-3/8-6 1-1/2-6 1-3/4-5 2-4-1/219.50 22.20 25.00 28.20 30.80 34.00 39.50 45.2019.761 22.606 25.349 28.524 31.115 34.290 39.827 45.59319.177 21.971 24.638 27.813 30.353 33.528 38.964 44.6792螺丝攻牙钻孔径和滚丝径对照表公制细螺纹 2 级牙钻孔径 规格 M1.0× 0.2 M1.1× 0.2 M1.2× 0.2 M1.4× 0.2 M1.6× 0.2 M1.7× 0.2 M1.8× 0.2 M2.0× 0.25 M2.2× 0.25 M2.3× 0.25 M2.5× 0.35 M2.6× 0.35 M3.0× 0.35 M3.5× 0.35 M4.0× 0.5 M4.5× 0.5 M5.0× 0.5 标准径 最大 0.80 0.90 1.00 1.20 1.40 1.45 1.60 1.75 1.95 2.05 2.20 2.20 2.70 3.20 3.50 4.00 4.50 0.821 0.921 1.021 1.221 1.421 1.500 1.621 1.785 1.985 2.061 2.221 2.246 2.721 3.221 3.599 4.099 4.599 最小 0.783 0.883 0.983 1.183 1.383 1.460 1.583 1.729 1.929 2.001 2.121 2.186 2.621 3.121 3.459 3.959 4.459 NO.0-80(1.524) NO.1-72(1.854) NO.2-64(2.184) NO.3-56(2.515) NO.4-48(2.845) NO.5-44(3.175) NO.6-40(3.505) NO.8-36(4.166) NO.10-32(4.826) NO.12-28(5.846) 1/4-28 5/16-24 3/8-24 7/16-20 1/2-20 9/16-18 5/8-183美制细螺纹 2 级牙钻孔径 规格（UNC） 标准径 最大 1.25 1.55 1.85 2.10 2.40 2.70 2.90 3.50 4.10 4.60 5.50 6.90 8.50 9.90 11.50 12.90 14.50 1.305 1.612 1.912 2.197 2.458 2.740 3.022 3.606 4.165 4.724 5.588 7.035 8.636 10.033 11.607 13.081 14.681 最小 1.182 1.474 1.756 2.025 2.271 2.551 2.820 3.404 3.963 4.496 5.360 6.782 8.382 9.729 11.329 12.751 14.351M5.5× 0.5 M6.0× 0.75 M6.0× 0.5 M7.0× 0.75 M7.0× 0.5 M8.0× 1.0 M8.0× 0.75 M8.0× 0.5 M9.0× 1.0 M9.0× 0.75 M10× 1.25 M10× 1.0 M10× 0.75 M10× 0.55.00 5.30 5.50 6.30 6.50 7.00 7.30 7.50 8.00 8.30 8.80 9.00 9.30 9.505.099 5.378 5.550 6.378 6.550 7.153 7.378 7.520 8.153 8.378 8.912 9.153 9.378 9.5204.959 5.188 5.400 6.188 6.400 6.917 7.188 7.400 7.917 8.188 8.647 8.917 9.188 9.4003/4-16 7/8-14 1-12 1-1/8-12 1-1/4-12 1-3/8-12 1-1/2-1217.50 20.50 23.20 26.50 29.50 32.80 36.0017.678 20.675 23.571 26.746 29.921 33.096 36.27117.323 20.270 23.114 26.289 29.464 32.639 35.814螺丝攻牙钻孔径和滚丝径对照表 公制细螺纹 2 级牙钻孔径 规格 M11× 1.0 标准径 最大 10.00 10.153 最小 9.9174美制细螺纹 2 级牙钻孔径 规格（UNC） 标准径 最大 最小M11× 0.75 M12× 1.5 M12× 1.25 M12× 1.0 M12× 0.5 M14× 1.5 M14× 1.0 M15× 1.5 M15× 1.0 M16× 1.5 M16× 1.0 M17× 1.5 M17× 1.0 M18× 2.0 M18× 1.5 M18× 1.0 M20× 2.0 M20× 1.5 M20× 1.0 M22× 2.0 M22× 1.510.30 10.50 10.80 11.00 11.50 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.00 16.50 17.00 18.00 18.50 19.00 20.00 20.5010.378 10.676 10.912 11.153 11.520 12.676 13.153 13.676 14.153 14.676 15.153 15.676 16.153 16.210 16.676 17.153 18.210 18.676 19.153 20.210 20.67610.188 10.376 10.647 10.917 11.400 12.376 12.917 13.376 13.917 14.376 14.917 15.376 15.917 15.835 16.376 16.917 17.835 18.376 18.917 19.835 20.3765M22× 1.0 M24× 2.0 M24× 1.5 M24× 1.0 M25× 2.0 M25× 1.5 M25× 1.0 M26× 1.5 M27× 2.0 M27× 1.5 M27× 1.0 M28× 2.0 M28× 1.5 M28× 1.0 M30× 3.0 M30× 2.0 M30× 1.5 M30× 1.0 M32× 2.0 M32× 1.5 M33× 3.021.00 22.00 22.50 23.00 23.00 23.50 24.00 24.50 25.00 25.50 26.00 26.00 26.50 27.00 27.00 28.00 28.50 29.00 30.00 30.50 30.0021.153 22.210 22.676 23.153 23.210 23.676 24.153 24.676 25.210 25.676 26.153 26.210 26.676 27.153 27.252 28.210 28.676 29.153 30.210 30.676 30.25220.917 21.835 22.376 22.917 22.835 23.376 23.917 24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835 30.376 29.7526M33× 2.0 M33× 1.5 M35× 1.5 M36× 3.0 M36× 2.0 M36× 1.5 签名档：31.00 31.50 33.50 33.00 34.00 34.5031.210 31.676 33.676 33.252 34.210 34.67630.835 31.376 33.376 32.752 33.835 34.376螺丝攻牙钻孔径和滚丝径对照表 公制挤压丝攻钻孔径 精度等级 规格 G4-G6 M1.0× 0.25 M1.1× 0.25 M1.2× 0.25 M1.4× 0.3 M1.6× 0.35 M1.7× 0.35 M1.8× 0.35 0.86 0.96 1.06 1.24 1.41 1.51 1.61 G7-G8 0.88 0.98 1.08 1.25 1.43 1.53 1.63 － － － － － － － G9 NO.2-56UNC NO.3-48 NO.4-40 NO.5-40 NO.6-32 NO.8-32 NO.10-24 规格（UNC） G4-G6 1.94 2.23 2.50 2.83 3.07 3.73 4.24 G7-G8 － － － － － 3.77 4.3 － － － － － － － G9 美制挤压丝攻钻孔径 精度等级7M2.0× 0.4 M2.2× 0.45 M2.3× 0.4 M2.5× 0.45 M2.6× 0.45 M3.0× 0.5 M3.5× 0.6 M4.0× 0.7 M5.0× 0.8 M6.0× 1.0 M7.0× 1.0 M8.0× 1.25 M10× 1.5 M10× 1.25 M12× 1.75 M12× 1.251.78 1.95 2.08 2.25 2.35 2.73 3.17 3.62 4.56 5.45 6.45 7.31 9.18 9.31 11.04 11.311.80 1.98 2.10 2.28 2.38 2.75 3.20 3.65 4.60 5.50 6.50 7.38 9.25 9.38 11.12 11.38－ － － － － － － 3.69 4.64 5.55 6.55 7.44 9.32 9.44 11.21 11.44NO.12-24 1/4-20 5/16-18 3/8-16 7/16-14 1/2-13 NO.2-64UNF NO.3-56 NO.4-48 NO.5-44 NO.6-40 NO.8-36 NO.10-32 NO.12-28 1/4-28 5/16-24 3/8-24 7/16-20 1/2-204.90 － － － － － 1.97 2.27 2.56 2.86 3.16 3.78 4.39 4.99 5.85 7.36 － － －4.96 5.72 7.24 8.74 10.20 11.27 － － － － － － 4.43 5.04 5.90 7.41 9.00 10.48 12.07－ － － 8.81 10.30 11.82 － － － － － － － － － － － 10.54 12.13签名档：8美制特细螺纹 2 级牙钻孔径 规格 NO.12-32 1/4 -32 标准径 最大 4.70 5.60 7.10 8.70 10.20 11.80 13.20 14.80 17.80 21.00 24.00 4.826 5.690 7.264 8.865 10.338 11.938 13.386 14.986 17.958 21.133 24.308 最小 4.623 5.486 7.087 8.661 10.135 11.709 13.132 14.732 17.678 20.853 24.028 2BA 3BA 4BA 5BA 6BA英制电器螺纹 规格 钻孔径 4.0-4.25/16 -32 3/8 -323.0-3.2 2.7-2.8 2.4-2.57/16 -28 1/2 9/16 5/8 3/4 7/8 1 -28 -24 -24 -20 -20 -20签名档：9螺丝攻牙钻孔径和滚丝径对照表 英制螺纹 钻孔径 规格(UNEF) 硬材 W 1/8 - 40 W 5/32 - 32 W 3/16 - 24 W 1/4 - 20 W 5/16 - 18 W 3/8 - 16 W 7/16 - 14 W 1/2 - 12 W 9/16 - 12 W 5/8 - 11 W 3/4 - 10 W 7/8 - 9 W1 - 8 W 1-1/8 - 7 W 1 - 1/4 - 7 2.65 3.25 3.75 5.10 6.60 8.00 9.40 软材 2.60 3.20 3.70 5.00 6.50 7.90 9.30 M3× 0.5 M3.0× 0.6 M3.5× 0.6 M4.0× 0.7 M4.0× 0.75 M4.5× 0.75 M5.0× 0.8 2.63-2.60 2.56-2.53 3.06-3.03 3.49-3.45 3.45-3.41 3.96-3.92 4.43-4.38 4.36-4.31 5.30-5.25 6.30-6.25 7.28-7.23 7.12-7.07 SM1/8-40 SM1/8-44 SM9/64-40 SM11/64-40 SM3/16-32 SM3/16-28 SM7/32-32 SM15/64-28 SM1/4-40 SM1/4-28 SM9/32-28 SM11/32-28 SM3/8-28 SM7/16-28 SM7/16-1610公制螺纹 规格 滚丝径 规格针车用螺纹 滚丝径 2.735-2.688 2.769-2.722 3.128-3.083 3.855-3.805 4.205-4.155 4.143-4.093 5.003-4.955 5.325-5.570 5.890-5.735 5.721-5.366 6.508-6.648 8.092-8.432 8.880-8.015 10.466-10.401 10.037-9.96710.70 10.50 M5.0× 0.9 12.30 12.00 M6.0× 1.0 13.70 13.50 M7.0× 1.0 16.70 16.50 M8.0× 1.0 19.50 19.30 M8.0× 1.25 22.40 22.00 25.00 24.80 28.30 28.00SM1/2-20 SM9/26-2011.819-11.749 13.400-13.425签名档：英制管螺纹 钻孔径英制管螺纹 标准径 有交 标准 牙部 长度 之长 （最美制管螺纹 钻孔径 NPT标准 规格 径 最大 最小 规格使用 不用 度（最 小）中 绞刀 绞刀 小）中 之毋 时 时 之毋 螺牙 螺牙 内径 内径 时 时 绞刀 绞刀 规格 使用 不用 NPSPS 1/16 6.50 6.632 6.490 28 PS 1/8 8.50 8.637 8.495 28PT 1/16 6.10 6.20 6.244 6.384 1/16 - 27 28 PT 1/8 8.10 8.20 8.249 8.388 1/8 - 27 28 8.33 8.43 8.74 6.10 6.25 6.3511PS 1/4 11.40 11.549 11.341 19 PS 3/8 15.00 15.054 14.846 19 PS 1/2 18.50 18.773 18.489 14 PS 3/4 24.00 24.259 23.975 -14PT 1/4 10.70 11.00 10.962 11.174 1/4 - 18 19 PT 3/8 14.20 14.50 14.448 14.658 3/8 - 18 19 PT 1/2 17.60 18.00 17.979 18.263 1/2 - 14 14 PT 3/4 23.00 23.50 23.378 23.663 3/4 - 14 14 28.58 28.98 29.36 22.63 23.01 23.42 17.48 17.86 18.26 14.27 14.27 14.68 10.72 11.13 11.13PS 1 - 11 30.20 30.471 30.111 PT 1- 11 29.00 29.50 29.459 29.822 1 - 11-1/2 PS 1-1/4 38.80 39.132 38.772 - 11 PS 1-1/2 44.80 45.025 44.665 - 11 - 11 - 11 PT 1-1/2 PT 1-1/437.50 38.00 37.976 38.339 1-1/4-11-1/2 37.31 37.69 38.1043.40 44.00 43.869 44.232 1-1/2-11-1/2 43.66 44.04 44.45PS 2 - 11 56.50 56.836 56.476 PT 2 - 11 54.90 55.50 55.412 55.844 2 - 11 - 1/2 55.58 55.96 56.36 签名档：12英制螺纹螺母孔径 英 制 纹 钻 螺纹直径 （英寸） 每英寸 牙数 头 直 径 螺纹直 （毫米） 径（英 铸铁、 黄 钢、 可锻 寸） 铜、 青铜 铸铁 3/16 1/4 5/16 3/8 1/2 5/8 3/4 7/8 1 11/8 11/4 11/2 13/4 2 24 20 18 16 12 11 10 9 8 7 7 6 5 41/2 3.8 5.1 6.6 8 10.6 13.6 16.6 19.5 22.3 25 28.2 34 39.5 45.3 3.9 5.2 6.7 8.1 10.7 13.8 16.8 19.7 22.5 25.2 28.4 34.2 39.7 45.6 1/8 1/4 3/8 1/2 3/4 1 11/4 13/8 11/2 28 19 19 14 14 11 11 11 11 8.8 11.7 15.2 18.9 24.4 30.6 39.2 41.6 45.1 牙数 米） 每英寸 径（毫 钻头直 螺 圆 螺 拄 纹 管13。
螺丝攻牙钻孔径和滚造径对照表
螺丝攻牙钻孔径和滚造径对照表螺丝攻牙钻孔径和滚造径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻规格（UN标准2级牙钻最大最小最大最小M1.0×0.25 0.70.70.7NO.1-1.51.5 1.4 M1.1×0.25 0.80.80.8NO.2-1.81.8 1.6 M1.2×0.25 0.90.90.9NO.3-2.12.1 1.9 M1.4×0.3 1.1 1.1 1.0NO.4-2.32.3 2.1 M1.6×0.35 1.2 1.3 1.2NO.5-2.62.6 2.4 M1.7×0.35 1.3 1.4 1.3NO.6-2.82.8 2.6 M1.8×0.35 1.4 1.5 1.4NO8- 3.43.5 3.3 M2.0×0.4 1.6 1.6 1.5NO.1 3.93.9 3.6 M2.2×0.45 1.7 1.8 1.7NO.1 4.54.5 4.3 M2.3×0.4 1.9 1.9 1.81/4- 5.15.2 4.9 M2.5×0.45 2.1 2.1 2.05/16-6.66.7 6.4 M2.6×0.45 2.2 2.2 2.13/8-8.08.17.7 M3.0×0.5 2.5 2.5 2.47/16-9.49.59.1 M3.0×0.6 2.4 2.4 2.21/2-10.11.10. M3.5×0.6 2.9 3.0 2.89/16-12.12.11. M4.0×0.7 3.3 3.4 3.25/8-13.12.13. M4.0×0.75 3.2 3.3 3.13/4-16.18.16. M4.5×0.75 3.8 3.8 3.67/8-9 19.19.19. M5.0×0.8 4.2 4.3 4.1 1 22.22.21. M5.0×0.9 4.1 4.1 3.91-25.25.24. M6.0×1.0 5.0 5.1 4.91-28.28.27. M7.0×1.0 6.0 6.1 5.91-30.31.30. M8.0×1.25 6.8 6.9 6.61-34.34.33. M9.0×1.25 7.87.97.61-39.39.38. M10×1.5 8.58.68.32-4-45.45.44. M11×1.5 9.59.69.3M12×1.75 10.10.10.M14×2.0 12.12.11.M16×2.0 14.14.13.M18×2.5 15.15.15.M20×2.5 17.17.17.M22×2.5 19.19.19.M24×3.0 21.21.20.M27×3.0 24.24.23.M30×3.5 26.26.26.M16丝孔钻14。
螺丝攻牙钻孔径和滚丝径对照表
螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格(UNC)标准径2级牙钻孔径M1.0 M1.1 M1.2 M1.4 M1.6 M1.7 M1.8 M2.0 M2.2 M2.3 M2.5 M2.6 M3.0 M3.0 M3.5 M4.0 M4.0 M4.5 M5.0 M5.0 M6.0 M7.0最h< 取小i 0.785 0.729 NO.1-64(1.854) 1.55 1.582 1.425i 0.885 0.829 NO.2-56(2.184) 1.80 1.871 1.695i 0.985 0.985 NO.3-48(2.515)2.10 2.146 1.9411.142 1.075 NO.4-40(2.845) 2.30 2.385 2.157i 1.321 1.221 NO.5-40(3.175) 2.60 2.697 2.487i 1.421 1.321 NO.6-32(3.505) 2.80 2.895 2.642i 1.521 1.421 NO8-32(4.166) 3.40 3.53 3.3021.679 1.567 NO.10-24(4.826) 3.90 3.962 3.683i 1.838 1.713 NO.12-24(5.486) 4.50 4.597 4.3441.979 1.867 1/4-20 5.10 5.257 4.979I 2.138 2.013 5/16-18 6.60 6.731 6.401I 2.238 2.113 3/8-16 8.00 8.153 7.7982.599 2.459 ?16-14 9.40 9.55 9.1442.440 2.280 1/2-13 10.80 11.023 10.5923.010 2.850 9/16-12 12.20 12.446 11.9893.422 3.242 ^8-11 13.60 12.868 13.386i 3.326 3.106 ^4-10 16.50 18.840 16.307I 3.878 3.688 778-9 19.50 19.761 19.1774.334 4.134 1 22.20 22.606 21.9714.170 3.930 1-1/8-7 25.00 25.349 24.6385.153 4.917 1-1/4-7 28.20 28.524 27.8136.153 5.917 1-3/8-6 30.80 31.115 30.3530.25 0.750.25 0.850.25 0.950.5 2.500.6 2.400.6 2.900.7 3.300.8 4.200.9 4.101.0 5.001.0 6.000.3 1.100.35 1.250.35 1.350.35 1.450.4 1.600.45 1.750.4 1.900.45 2.100.45 2.200.75 3.250.75 3.80M8.0 X 1.25 6.80 6.912 6.647 1-1/2-6 34.00 34.290 33.528M9.0 X 1.25 7.80 7.912 7.647 1-3/4-5 39.50 39.827 38.964M10X 1.5 8.50 8.676 8.376 2-4-1/2 45.20 45.593 44.679M11X 1.5 9.50 9.676 9.376M12X 1.75 10.30 10.441 10.106M14X 2.0 12.00 12.210 11.835M16X 2.0 14.00 14.210 13.835M18X 2.5 15.50 15.744 15.294M20X 2.5 17.50 17.744 17.294M22X 2.5 19.50 19.744 19.294M24X 3.0 21.00 21.252 20.752M27X 3.0 24.00 24.252 23.752M30X 3.5 26.50 26.771 26.211螺丝攻牙钻孔径和滚丝径对照表公制细螺纹美制细螺纹规格标准径2级牙钻孔径规格(UNC)标准径2级牙钻孔径最大最小最大最小M1.0 X 0.2 0.80 0.821 0.783 N0.0-80(1.524) 1.25 1.3051.182M1.1 X 0.2 0.90 0.921 0.883 NO.1-72(1.854) 1.55 1.6121.474M1.2 X 0.2 1.00 1.021 0.983 NO.2-64(2.184) 1.85 1.9121.756M1.4 X 0.2 1.20 1.221 1.183 NO.3-56(2.515) 2.10 2.1972.025M1.6 X 0.2 1.40 1.421 1.383 NO.4-48(2.845) 2.40 2.4582.271M1.7 X 0.2 1.45 1.500 1.460 NO.5-44(3.175) 2.70 2.740 2.551 M1.8 X 0.2 1.60 1.621 1.583 N0.6-40(3.505) 2.90 3.022 2.820 M2.0 X 0.25 1.75 1.785 1.729 NO.8-36(4.166)3.50 3.606 3.404M2.2 X 0.25 1.95 1.985 1.929 NO.10-32件826) 4.10 4.165 3.963M2.3 X 0.25 2.05 2.061 2.001 NO.12-28(5.846) 4.60 4.724 4.496 M2.5 X 0.35 2.20 2.221 2.121 1/4-28 5.50 5.588 5.360M2.6 X 0.35 2.20 2.246 2.186 5/16-24 6.90 7.035 6.782M3.0 X 0.35 2.70 2.721 2.621 38-24 8.50 8.636 8.382M3.5 X 0.35 3.20 3.221 3.121 7716-20 9.90 10.033 9.729M4.0 X 0.5 3.50 3.599 3.459 1/2-20 11.50 11.607 11.329M4.5 X 0.5 4.00 4.099 3.959 9/16-18 12.90 13.081 12.751M5.0 X 0.5 4.50 4.599 4.459 ^8-18 14.50 14.681 14.351M5.5 X 0.5 5.00 5.099 4.959 34-16 17.50 17.678 17.323M6.0 X 0.75 5.30 5.378 5.188 778-14 20.50 20.675 20.270M6.0 X 0.5 5.50 5.550 5.400 1-12 23.20 23.571 23.114M7.0 X 0.75 6.30 6.378 6.188 1-1/8-12 26.50 26.746 26.289M7.0 X 0.5 6.50 6.550 6.400 1-1/4-12 29.50 29.921 29.464M8.0 X 1.0 7.00 7.153 6.917 1-3/8-12 32.80 33.096 32.639M8.0 X 0.75 7.30 7.378 7.188 1-1/2-12 36.00 36.271 35.814M8.0 X 0.5 7.50 7.520 7.400M9.0 X 1.0 8.00 8.153 7.917M9.0 X 0.75 8.30 8.378 8.188M10X 1.25 8.80 8.912 8.647M10X 1.0 9.00 9.153 8.917M10X 0.75 9.30 9.378 9.188M10X 0.5 9.50 9.520 9.400M11X 1.0 10.00 10.153 9.917M11X 0.75 10.30 10.378 10.188M12X 1.5 10.50 10.676 10.376M12X 1.25 10.80 10.912 10.647M12X 1.0 11.00 11.153 10.917 M12X 0.5 11.50 11.520 11.400M14X 1.5 12.50 12.676 12.376 M14X 1.0 13.00 13.153 12.917 M15X 1.5 13.50 13.676 13.376 M15X 1.0 14.00 14.153 13.917 M16X 1.5 14.50 14.676 14.376 M16X 1.0 15.00 15.153 14.917 M17X 1.5 15.50 15.676 15.376 M17X 1.0 16.00 16.153 15.917 M18X 2.0 16.00 16.210 15.835 M18X 1.5 16.50 16.676 16.376 M18X 1.0 17.00 17.153 16.917 M20X 2.0 18.00 18.210 17.835 M20X 1.5 18.50 18.676 18.376 M20X 1.0 19.00 19.153 18.917 M22X 2.0 20.00 20.210 19.835M22X 1.5 20.50 20.676 20.376 M22X 1.0 21.00 21.153 20.917M24X 2.0 22.00 22.210 21.835M24X 1.5 22.50 22.676 22.376 M24X 1.0 23.00 23.153 22.917M25X 2.0 23.00 23.210 22.835 M25X 1.5 23.50 23.676 23.376 M25X 1.0 24.00 24.153 23.917 M26X 1.5 24.50 24.676 24.376M27X 2.0 25.00 25.210 24.835M27X 1.5 25.50 25.676 25.376M27X 1.0 26.00 26.153 25.917M28X 2.0 26.00 26.210 25.835M28X 1.5 26.50 26.676 26.376M28X 1.0 27.00 27.153 26.917M30X 3.0 27.00 27.252 26.752M30X 2.0 28.00 28.210 27.835M30X 1.5 28.50 28.676 28.376M30X 1.0 29.00 29.153 28.917M32X 2.0 30.00 30.210 29.835M32X 1.5 30.50 30.676 30.376M33X 3.0 30.00 30.252 29.752M33X 2.0 31.00 31.210 30.835M33X 1.5 31.50 31.676 31.376M35X 1.5 33.50 33.676 33.376M36X 3.0 33.00 33.252 32.752M36X 2.0 34.00 34.210 33.835M36X 1.5 34.50 34.676 34.376螺丝攻牙钻孔径和滚丝径对照表公制挤压丝攻钻孔径美制挤压丝攻钻孔径规格精度等级规格(UNC)精度等级G4-G6 G7-G8 G9 G4-G6 G7-G8 G9M1.0 X 0.25 0.86 0.88 — NO.2-56UNC 1.94M1.1 X 0.25 0.96 0.98 — NO.3-48 2.23 —M1.2 M1.4 M1.6 M1.7 M1.8 M2.0 M2.2 M2.3 M2.5 M2.6 M3.0 M3.5 M4.0 M5.0 M6.0 M7.0 M8.0 M10 M10 M12 M12 0.25 1.06 1.08 — NO.4-40 2.50 ——0.3 1.24 1.25 —NO.5-40 2.83 ——0.35 1.41 1.43 —NO.6-32 3.07 ——0.35 1.51 1.53 —NO.8-32 3.73 3.77 —0.35 1.61 1.63 —NO.10-24 4.24 4.3 —0.4 1.78 1.80 —NO.12-24 4.90 4.96 —0.45 1.95 1.98 —1/4-20 — 5.72 —0.4 2.08 2.10 —5^16-18 — 7.24 —0.45 2.25 2.28 —^8-16 — 8.74 8.810.45 2.35 2.38 —7716-14 — 10.20 10.30 0.5 2.73 2.75 —1/2-13 — 11.27 11.82 0.6 3.17 3.20 —NO.2-64UNF 1.97 ——0.7 3.62 3.65 3.69 NO.3-56 2.27 ——0.8 4.56 4.60 4.64 NO.4-48 2.56 ——1.0 5.45 5.50 5.55 NO.5-442.86 ——1.0 6.45 6.50 6.55 NO.6-40 3.16 ——1.25 7.31 7.38 7.44 NO.8-36 3.78 ——1.5 9.18 9.25 9.32 NO.10-32 4.39 4.43 —1.25 9.31 9.38 9.44 NO.12-28 4.99 5.04 —5.901.75 11.04 11.12 11.21 1/4-28 5.851.25 11.31 11.38 11.44 5/16-24 7.36 7.4138-24 9.00力6-20 10.48 10.541/2-20 12.07 12.13美制特细螺纹英制电器螺纹规格标准径2级牙钻孔径规格钻孔径最大最小NO.12-32 4.70 4.826 4.623 2BA 4.0-4.21/4 -32 5.60 5.690 5.486 3BA06 -32 7.10 7.264 7.087 4BA 3.0-3.238 -32 8.70 8.865 8.661 5BA 27-2.87716 -28 10.20 10.338 10.135 6BA2.4-2.51/2 -28 11.80 11.938 11.7099/16 -24 13.20 13.386 13.13238 -24 14.80 14.986 14.73234 -20 17.80 17.958 17.678778 -20 21.00 21.133 20.8531 -20 24.00 24.308 24.028螺丝攻牙钻孔径和滚丝径对照表英制螺纹公制螺纹针车用螺纹规格(UNEF)钻孔径规格滚丝径规格滚丝径硬材软材W 1/8 -40 2.65 2.60 M3X 0.5 2.63-2.60 SM78-40 2.735-2.688W ®32 - 32 3.25 3.20 M3.0 X 0.6 2.56-2.53 SM&44 2.769-2.722W3/16 -24 3.75 3.70 M3.5 X 0.6 3.06-3.03 SM904-4O 3.128-3.083 W 1/4 - 20 5.10 5.00 M4.0 X 0.7 3.49-3.45 SM1/B4-40 3.855-3.805 W^16- 18 6.60 6.50 M4.0 X 0.75 3.45-3.41 SIVK36-32 4.205-4.155 W3/8- 16 8.00 7.90 M4.5 X 0.75 3.96-3.92 SM36-28 4.143-4.093W 7716- 14 9.40 9.30 M5.0 X 0.8 4.43-4.38 SIWB2-32 5.003-4.955W 1/2 - 12 10.70 10.50 M5.0 X 0.9 4.36-4.31 SM1/54-28 5.325-5.570W1 - 8 22.40 22.00 SM3/8-28 8.880-8.015W 1-1/8 - 7 25.00 24.80 W 1 - 1/4 - 7 28.30 28.00SM7/16-28 10.466-10.401 SM7/16-16 10.037-9.967SM1/2-20 11.819-11.749 SM9/26-20 13.400-13.425英制管螺纹 英制管螺纹 美制管螺纹规格 标准径 钻孔径 规格 标准径 有交牙部之长度（最小）中之毋螺牙内径 标准长度（最小）中之毋螺牙内径 规格 钻孔径 最大 最小 使用绞刀时 不用绞刀时 NPT NPS 使用绞刀时 不用绞刀时PS 1/16 - 28 6.50 6.632 6.490 PT 1/16 - 28 6.10 6.20 6.244 6.384 1/16 - 27 6.10 6.25 6.35 PS 1/8 - 28 8.508.637 8.495 PT 1/8 - 28 8.108.20 8.249 8.388 1/8 - 27 8.338.438.74PS 1/4 - 19 11.40 11.549 11.341 PT 1/4 - 19 10.70 11.00 10.962 11.174 1/4 - 18 10.72 11.13 11.13 PS 3/8-19 15.00 15.054 14.846PT 3/8 - 19 14.20 14.5014.448 14.658 3/8 - 18 14.27 14.27 14.68 PS 1/2 -14 18.50 18.773 18.489 PT 1/2 - 14 17.60 18.00 17.979 18.263 1/2 - 14 17.48 17.8618.26PS 3/4 -14 24.00 24.259 23.975 PT 3/4 - 14 23.0023.50 23.378 23.663 3/4 - 14 22.6323.01 23.42PS 1 - 11 30.20 30.471 30.111 PT 1- 11 29.00 29.50 29.459 29.822 1 - 11-1/2 28.58 28.9829.36PS 1-1/4 - 11 38.80 39.132 38.772 PT 1-1/4 - 11 37.50 38.0037.976 38.339 1-1/4-11-1/2 37.31 37.6938.10 PS 1-1/2 - 11 44.80 45.025 44.665 PT 1-1/2 - 11 43.40 44.00 43.869 44.232 1-1/2-11-1/2 43.6644.0444.45PS 2 - 11 56.50 56.836 56.476 PT 2 - 11 54.9055.5055.412 55.844 2 - 11 - 1/2 55.5855.96 56.36W 9/16 - 12 12.30 12.00 M6.0 X 1.0 5.30-5.25 SM/4-40 5.890-5.735 W 5/8 - 11 13.70 13.50 M7.0X 1.0 6.30-6.25 SM/14-28 5.721-5.366 W 3/4 - 10 16.70 16.50 M8.0X 1.0 7.28-7.23 SM93/2-28 6.508-6.648 W 7/8 - 9 19.50 19.30 M8.0X 1.25 7.12-7.07 SM1/132-28 8.092-8.432。
螺纹攻牙底孔孔径对照表
当之处，应视实际状况适当的变更钻头直径。
本表是依据2级牙制订。
注：迫牙丝攻之钻孔径，在上表所列之数
值，由于被加工 材料之材质、硬度、形状
、尺寸等之影响，多少会有所变动，因此于
参考上表之同时，亦请增减若干。
螺纹攻牙钻孔径和滚造径对照表
本表所推选之钻头孔径，是针对攻牙加工时，能够很容易的了解钻孔直径；而依据市售之标准钻头所选定的。
在使用钻头的情况下，由于钻头的形状及尺寸、精度、被钻孔之材质等，对于所钻孔的尺寸、精度有很大的影响，所以使用本表之钻孔径，若有不。
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0.783 0.883 0.983 1.183 1.383 1.460 1.583 1.729 1.929 2.001 2.121 2.186 2.621 3.121 3.459 3.959 4.459 4.959 5.188 5.400 6.188 6.400 6.917 7.188 7.400 7.917 8.188 8.647 8.917 9.188 9.400 8.917 10.188 10.376 10.647
1.182 1.474 1.756 2.025 2.271 2.551 2.820 3.404 3.963 4.496 5.360 6.782 8.382 9.729 11.329 12.751 14.351 17.323 20.270 23.114 26.289 29.464 32.639 35.814
0.821 0.921 1.021 1.221 1.421 1.500 1.621 1.785 1.985 2.610 2.221 2.246 2.721 3.221 3.599 4.099 4.599 5.099 5.378 5.550 6.378 6.550 7.153 7.378 7.520 8.153 8.378 8.912 9.153 9.378 9.520 10.153 10.378 10.676 10.912
1.25 1.55 1.85 2.10 2.40 2.70 2.90 3.50 4.10 4.60 5.50 6.90 8.50 9.90 11.50 12.90 14.50 17.50 20.50 23.20 26.50 29.50 32.80 36.00
1.305 1.612 1.912 2.197 2.458 2.740 3.022 3.606 4.165 4.724 5.588 7.035 8.636 10.033 11.607 13.081 14.681 17.678 20.575 23.571 26.746 29.921 33.096 36.271
M12*1.0 M12*0.5 M14*1.5 M14*1.0 M15*1.5 M15*1.0 M16.1.5 M16*1.0 M17*1.5 M17*1.0 M18*2.0 M18*1.5 M18*1.0 M20*2.0 M20*1.5 M20*1.0 M22*2.0 M22*1.5 M22*1.0 M24*2.0 M24*1.5 M24*1.0 M25*2.0 M25*1.5 M25*1.0 M26*1.5 M27*2.0 M27*1.5 M27*1.0 M28*2.0 M28*1.5 M28*1.0 M30*3.0 M30*2.0 M30*1.5 M30*1.0 M32*2.0 M32*1.5 M33*1.0 M33*2.0 M33*1.5 M35*1.5 M36*3.0 M36*2.0 M36*1.5
M1.0*0.25 0.86 0.88 M1.1*0.25 0.96 0.98 M1.2*0.25 1.06 1.08 M1.4*0.30 1.24 1.25 M1.6*0.35 1.41 1.43 M1.7*0.35 1.51 1.53 M1.8*0.35 1.61 1.63 M2.0*0.40 1.78 1.80 M2.2*0.45 1.95 1.98 M2.3*0.40 2.08 2.10 M2.5*0.45 2.25 2.28 M2.6*0.45 2.35 2.38 M3.0*0.50 2.73 2.75 M3.5*0.60 3.17 3.20 M4.0*0.70 3.62 3.65 3.69 M5.0*0.80 4.56 4.60 4.64 M6.0*1.00 5.45 5.50 5.55 M7.0*1.00 6.45 6.50 6.55 M8.0*1.25 7.31 7.38 7.44 M10*1.50 9.18 9.25 9.32 M10*1.25 9.31 9.38 9.44 M12*1.75 11.04 11.12 11.21 M12*1.25 11.31 11.38 11.44 注:迫牙丝攻之钻孔径,在上表所列之数值,由 于被加工材料之材质,硬度,形状,尺寸等之影 响,多少会有所变动,因此于参考上表之同时, 亦精增减若干。
0.729 0.829 0.929 1.075 1.221 1.321 1.421 1.567 1.713 1.867 2.013 2.113 2.459 2.280 2.850 3.242 3.106 3.688 4.134 3.930 4.917 5.917 6.647 7.647 8.376 9.376 10.160 11.835 13.835 15.294 17.294 19.294 20.752 23.752 26.211
0.75 0.85 0.95 1.00 1.25 1.35 1.45 1.60 1.75 1.90 2.10 2.20 2.50 2.40 2.90 3.30 3.25 3.80 4.20 4.10 5.00 6.00 6.80 7.80 8.50 9.50 10.30 12.00 14.00 15.50 17.50 19.50 21.00 24.00 26.50
美制粗螺纹
规格(UNC) 标准径 2级牙钻孔径 最大 最小
美制细螺纹
规格(UNF) 标准径 2级牙钻孔径 最大 最小
No 0-80(1.524) No 1-72(1.854) No 2-64(2.184) No 3-58(2.515) No 4-48(2.845) No 5-44(3.175) No 6-40(3.506) No 8-36(4.166) No 10-32(4.826) No 12-28(5.846) 1/4 - 28 5/16 - 24 3/8 - 24 7/16 - 20 1/2 - 20 9/16 - 18 5/8 - 18 3/4 - 16 7/8 - 14 1 - 12 1-1/8 - 12 1-1/4 - 12 1-3/8 - 12 1-1/2 - 12
标准径 2级牙钻孔径 最大 最小
公制迫牙丝攻钻孔径
规格 精 度 等级 G4-G6 G7-G8 G9
M1.0*0.25 M1.1*0.25 M1.2*0.25 M1.4*0.30 M1.6*0.35 M1.7*0.35 M1.8*0.35 M2.0*0.40 M2.2*0.45 M2.3*0.40 M2.5*0.45 M2.6*0.45 M3.0*0.50 M3.0*0.60 M3.5*0.60 M4.0*0.70 M4.0*0.75 M4.5*0.75 M5.0*0.80 M5.0*0.90 M6.0*1.00 M7.0*1.00 M8.0*1.25 M9.0*1.25 M10*1.50 M11*1.50 M12*1.75 M14*2.00 M16*2.00 M18*2.50 M20*2.50 M22*2.50 M24*3.00 M27*3.00 M30*3.50
11.153 11.520 12.676 13.153 13.676 14.153 14.676 15.153 15.676 16.153 16.210 16.676 17.153 18.210 18.676 19.153 20.210 20.676 21.153 22.210 22.676 23.153 23.210 23.676 24.153 24.676 25.210 25.676 26.153 26.210 26.676 27.153 27.152 28.210 28.676 29.153 30.210 30.676 30.252 31.210 31.676 33.676 33.252 34.210 34.676
螺丝攻牙钻孔径和滚造径对照表
公制粗螺纹
规格 标准径 2级牙钻孔径 最大 最小；而依抿市售之标准钻头所选定的，在使用钻头的情 精度有很大的影响，所以使用本表之钻孔径，若有不当之处，应视实际壮况适当的变更钻头直径，本表是依据2级牙
公制细螺纹
10.917 11.400 12.376 12.917 13.376 13.917 14.376 14.917 15.376 15.917 15.835 16.976 16.917 17.835 18.376 18.917 19.835 20.376 20.917 21.835 22.376 22.917 22.835 23.376 23.917 24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835 30.376 29.752 30.835 31.376 33.376 32.752 33.835 34.376
No 1-64(1.854) No 2-56(2.184) No 3-48(2.515) No 4-40(2.845) No 5-40(3.175) No 6-32(3.505) No 8-32(4.166) No 10-24(4.826) No 12-24(5.486) 1/4 - 20 5/16 - 18 3/8 - 16 7/16 - 14 1/2 - 13 9/16 - 12 5/8 - 11 3/4 - 10 7/8 - 9 1 - 8 1-1/8 - 7 1-1/4 - 7 1-3/8 - 6 1-1/2 - 6 1-3/4 - 5 2 - 4-1/2
公制细螺纹
规格 标准率 2级牙钻孔径 最大 最小
M1.0*0.2 M1.1*0.2 M1.2*0.2 M1.4*0.2 M1.6*0.2 M1.7*0.2 M1.8*0.2 M2.0*0.25 M2.2*0.25 M2.3*0.25 M2.5*0.35 M2.6*0.35 M3.0*0.35 M3.5*0.35 M4.0*0.5 M4.5*0.5 M5.0*0.5 M5.5*0.5 M6.0*0.75 M6.0*0.5 M7.0*0.75 M7.0*0.5 M8.0*1.0 M8.0*0.75 M8.0*0.5 M9.0*1.0 M9.0*0.75 M10*1.25 M10*1.0 M10*0.75 M10*0.5 M11*1.0 M11*0.75 M12*1.50 M12*1.25