螺丝攻对照表
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
×
×
×
×
×
×
×
NO8-32
×
×
×
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
×
1-1/8-7
×
G7-G8
G9
×
－
－
－
×
－
－
－
×
－
－
－
×
－
－
－
×
－
－
－
×
－
－
×
－
－
×
－
－
×
－
1/4-20
－
－
×
－
5/16-18
－
－
×
－
3/8-16
－
×
－
7/16-14
－
×
－
1/2-13
－
×
－
－
－
×
－
－
×
－
－
×
－
－
×
－
－
×
－
－
M10×
－
M10×
－
M12×
1/4-28
－
M12×
5/16-24
螺丝攻牙径对照表(集合版)
最大最小最大最小最大最小规格精度最大最小最大最小最大最小最大最小规格精度最大最小M1.0×0.20.800.8210.783M1.0×0.250.750.7850.729(螺丝牙外径）硬材软材M1.1×0.20.900.9210.883M1.1×0.250.850.8850.829No.0-80(1.524) 1.25 1.305 1.182 # 1 -64G5 1.76 1.68 2.65 2.6M1.2×0.2 1.00 1.0210.983M1.2×0.250.950.9850.929No.1-72(1.854) 1.55 1.612 1.474 #2 -56G4 2.04 1.96 3.25 3.2M1.4×0.2 1.20 1.221 1.183M1.4×0.3 1.10 1.142 1.075No.2-64(2.184) 1.85 1.912 1.756 # 3-48G4 2.35 2.25 3.75 3.7M1.6×0.2 1.40 1.421 1.383M1.6×0.35 1.25 1.321 1.221No.3-56(2.515) 2.1 2.197 2.025 #4 -40G5 2.64 2.54 5.15M1.7×0.2 1.50 1.521 1.483M1.7×0.35 1.35 1.421 1.321No.4-48(2.845) 2.4 2.458 2.271 #5 -40G5 2.97 2.87 6.6 6.5M1.8×0.2 1.60 1.621 1.583M1.8×0.35 1.45 1.521 1.421No.5-44(3.175) 2.7 2.74 2.551 #6 -32G53.22 3.1187.9M2.0×0.25 1.75 1.785 1.729M2.0×0.4 1.60 1.679 1.576No.6-40(3.505) 2.9 3.022 2.82 #8 -32G63.89 3.789.49.3M2.2×0.25 1.95 1.985 1.929M2.2×0.45 1.75 1.838 1.713No.8-36(4.166) 3.5 3.606 3.404 #10 -24G6 4.44 4.310.710.5M2.3×0.25 2.05 2.085 2.029M2.3×0.4 1.90 1.979 1.867No.10-32(4.826) 4.1 4.165 3.963 #12 -24G65.07 4.9612.312M2.5×0.35 2.20 2.221 2.121M2.5×0.45 2.10 2.138 2.013No.12-28(5.846)4.6 4.724 4.496 1/4" -20G75.86 5.7313.713.5M2.6×0.35 2.20 2.321 2.221M2.6×0.45 2.20 2.238 2.1132001/4/28 5.5 5.588 5.36 5/16" -18G77.387.2316.716.5M3.0×0.35 2.70 2.721 2.621M3.0×0.5 2.50 2.599 2.4595/16 -24 6.97.035 6.782 3/8" -16G78.898.7219.519.3M3.5×0.35 3.20 3.221 3.121M3.5×0.6 2.90 3.010 2.8502003/8/248.58.6368.382 7/16" -14G810.410.0222.422M4.0×0.5 3.50 3.599 3.459M4.0×0.7 3.30 3.422 3.2427/16 -209.910.0339.729 1/2" -13G811.9211.72524.8M4.5×0.5 4.00 4.099 3.959M4.5×0.75 3.80 3.878 3.6881/2-2011.511.60711.32928.328M5.0×0.5 4.50 4.599 4.459M5.0×0.8 4.20 4.334 4.1349/16 -1812.913.08112.751 0 -80G5 1.45 1.39M5.5×0.5 5.00 5.099 4.959M6.0×1.0 5.00 5.153 4.9175/8一1814.514.68114.351 1 -72G5 1.7711.7M6.0×0.75 5.30 5.378 5.188M7.0×1.0 6.00 6.153 5.9173/4一1617.517.67817.3232 -64G4 2.06 1.98M6.0×0.5 5.50 5.599 5.459M8.0×1.25 6.80 6.912 6.6477/8一1420.520.67520.27 3 -56G4 2.37 2.29M7.0×0.75 6.30 6.378 6.188M9.0×1.257.807.9127.6471一1223.223.57123.114 4 -48G5 2.68 2.59M7.0×0.5 6.50 6.599 6.459M10×1.58.508.6768.3761-1/8-1226.526.74626.289 5 -44G5 2.99 2.9标准径钻孔径M8.0×1.07.007.153 6.917M11×1.59.509.6769.3761-1/4-1229.529.92129.464 6 -40G5 3.29 3.19最大最小M8.0×0.757.307.3787.188M12×1.7510.3010.44110.1061-3/8-1232.833.09632.639 8 -36G5 3.91 3.81M8.0×0.57.507.5997.459M14×2.012.0012.21011.8351-1/2-123636.27135.81410 -32G6 4.53 4.44 6.5 6.632 6.49M9.0×1.08.008.1537.917M16×2.014.0014.21013.835 12 -28G65.135.038.58.6378.495 M9.0×0.758.308.3788.188M18×2.515.5015.74415.294 1/4" -28G765.9111.411.54911.341M10×1.258.808.9128.647M20×2.517.5017.74417.294 5/16" -24G77.537.421515.05414.846M10×1.09.009.1538.917M22×2.519.5019.74419.294最大最小 3/8" -24G79.18.9918.518.77318.489M10×0.759.309.3789.188M24×3.021.0021.25220.752No.12-32 4.7 4.826 4.623 7/16" -20G810.6210.482424.25923.975M10×0.59.509.5999.459M27×3.024.0024.25223.7521/4 -32 5.6 5.69 5.486 1/2" -20G812.212.0630.230.47130.111M11×1.010.0010.1539.917M30×3.526.5026.77126.2115/16 -327.17.2647.08738.839.13238.772M11×0.7510.3010.37810.188M33×3.529.5029.77129.2113/8 -328.78.8658.66144.845.02544.665M12×1.510.5010.67610.376M36×4.032.0032.27031.6707/16 -2810.210.33810.13556.556.83656.476M12×1.2510.8010.91210.647M39×4.035.0035.27034.6701/2一2811.811.93811.709M12×1.011.0011.15310.9179/16 -2413.213.38613.132规格精度最大最小M12×0.511.5011.59911.4595/8一2414.814.98614.732M1.0×0.25G40.920.89M14×1.512.5012.67612.3763/7一2017.817.95817.678M1.2×0.25G4 1.12 1.09标准径M14×1.013.0013.15312.917最大最小7/8一502121.13320.853M1.4×0.30G4 1.3 1.26M15×1.513.5013.67613.376(螺丝牙外径）1一202424.30824.028M1.6×0.35G4 1.47 1.42M15×1.014.0014.15313.917No.1 -64(1.854) 1.55 1.582 1.425M1.7×0.35G4 1.57 1.52PT 1/16 - 28 6.1 6.2 6.244 6.384M16×1.514.5014.67614.376No.2 -56(2.184) 1.8 1.871 1.695M1.8×0.35G4 1.67 1.62PT 1/8 - 288.18.28.2498.388M16×1.015.0015.15314.917No.3 -48(2.515) 2.1 2.146 1.941M2.0×0.40G4 1.84 1.79PT 1/4 - 1910.71110.96211.174M17×1.515.5015.67615.376No.4 -40(2.845) 2.3 2.385 2.157M2.2×0.45G5 2.04 1.97PT 3/8 - 1914.214.514.44814.658M17×1.016.0016.15315.917No.5 -40(3.175) 2.6 2.697 2.487规格标准径最大最小M2.3×0.40G4 2.14 2.09PT 1/2 - 1417.61817.97918.263M18×2.016.0016.21015.835No.6 -32(3.505) 2.8 2.895 2.642SM1/16 - 80 1.25 1.281 1.211M2.5×0.45G5 2.34 2.27PT 3/4 - 142323.523.37823.663M18×1.516.5016.67616.376No.8 -32(4.166) 3.4 3.53 3.302SM5/64 - 64 1.55 1.593 1.513M2.6×0.45G5 2.44 2.37PT 1- 112929.529.45929.822M18×1.017.0017.15316.917No.10-24(4.826) 3.9 3.962 3.683SM3/32 - 56 1.90 1.936 1.841M3.0×0.50G5 2.82 2.75PT 1-1/4 - 1137.53837.97638.339M20×2.018.0018.21017.835No.12-24(5.486) 4.5 4.597 4.344SM3/32 -100 2.10 2.156 2.081M3.5×0.60G5 3.27 3.19PT 1-1/2 - 1143.44443.86944.232M20×1.518.5018.67618.3761/4 --20(6.35) 5.1 5.257 4.979SM1/8 - 32 2.30 2.393 2.233M4.0×0.70G6 3.72 3.65PT 2 - 1154.955.555.41255.844M20×1.019.0019.15318.9175/16 -18(7.93) 6.6 6.731 6.401SM1/8 - 40 2.50 2.551 2.421M5.0×0.80G6 4.67 4.59M22×2.020.0020.21019.8353/8—16(9.52)88.1537.798SM1/8 - 44 2.50 2.605 2.485M6.0×1.0G7 5.59 5.49M22×1.520.5020.67620.3767/16—14(11.11)9.49.559.144SM1/8 - 48 2.60 2.657 2.547M7.0×1.0G7 6.59 6.49M22×1.021.0021.15320.9171/2—13(12.7)10.811.02310.592SM9/64 - 32 2.70 2.79 2.630M8.0×1.25G77.497.36M24×2.022.0022.21021.8359/16—12(14.28)12.212.44611.989SM9/64 - 40 2.90 2.948 2.818M10×1.50G79.349.22M24×1.522.5022.67622.3765/8—11(15.87)13.612.86813.386 SM11/64 -32 3.50 3.584 3.424M10×1.25G79.499.35M24×1.023.0023.15322.9173/4—10(19.05)16.518.8416.307 SM11/64 -40 3.70 3.742 3.612M12×1.75G811.2311.09 6.7 6.843 6.561M25×2.023.0023.21022.8357/8—9(22.22)19.519.76119.177SM3/16 - 24 3.60 3.658 3.498M12×1.25G911.511.368.78.8488.566M25×1.523.5023.67623.3761—8(25.4)22.222.60621.971SM3/16 - 28 3.80 3.844 3.68411.711.8911.445M25×1.024.0024.15323.9171-1/8-7(28.57)2525.34924.638SM3/16 - 32 3.90 3.98 3.82015.215.39514.95M26×1.524.5024.67624.3761-1/4-728.228.52427.813SM3/16 - 40 4.05 4.138 4.0081919.17218.631M27×2.025.0025.21024.8351-3/8-630.831.11530.353SM7/32 - 32 4.70 4.774 4.6142121.12850.587M27×1.525.5025.67625.3761-1/2-63434.2933.528SM15/64 -28 5.00 5.055 4.87524.524.65824.117M27×1.026.0026.15325.9171-3/4-539.539.82738.964SM1/4 - 24 5.20 5.266 5.08628.228.41827.877M28×2.026.0026.21025.835 2 -4-1/245.245.59344.679SM1/4 - 28 5.40 5.452 5.27230.630.93130.291M28×1.526.5026.67626.376SM1/4 - 40 5.60 5.726 5.59635.235.59238.952M28×1.027.0027.15326.917SM9/32 - 20 5.70 5.824 5.63439.229.59238.952M30×3.027.0027.25226.752SM9/32 - 286.20 6.256 6.0664545.48544.845M30×2.028.0028.21027.835最大最小SM5/16 - 18 6.30 6.444 6.2545151.42850.788M30×1.528.5028.67628.376No.12-32 4.7 4.826 4.623SM5/16 - 24 6.80 6.864 6.674使用绞刀时不用绞刀时5757.29656.656M30×1.029.0029.15328.9171/4 -32 5.6 5.69 5.486SM5/16 - 28 6.907.05 6.8601/16 -27 6.1 6.25 6.35M32×2.030.0030.21029.8355/16 -327.17.2647.087SM11/32 -287.707.8437.6531/8一278.338.438.74M32×1.530.5030.67630.3763/8 -328.78.8658.661SM3/8 - 187.908.0537.8431/4一1810.7211.1311.13英 制 电 器 螺 纹W1 -8W1-1/8 -7W1-1/4 -7螺丝攻牙钻孔径对照表本表依据2级牙制定，由于钻头的形状，精度及被加工材质等对钻孔尺寸精度有很大影响，若有不当之处，应视实际状况适当变更钻头直径PF 2-11钻孔径规格W1/8 -40W5/32 -32W3/16 -24W1/4 -20W5/16 -18W3/8 -16W7/16 -14W1/2 -12W9/16 -12W5/8 -11W3/4 -10W7/8 -9PF 1-11PF 11/8-11PF 11/2-11PF 13/4-11PF 3/8-19PF 1/2-14PF 5/8-14PF 3//4-14PF 7/8-14标准径PF 规格新规格G PF 1/16 - 28PF 1/8-28PF 1/4-19英制螺纹不用绞刀时有交牙部之长度（最小）中之毋螺牙内径公制细螺纹美制粗牙螺纹规格（UNC)规格标准径2级牙钻孔径公制粗螺纹标准径2级牙钻孔径美制特细牙螺纹UNF PS 1/2 - 14PS 3/4 -14PS 1 - 11PS 1-1/4 - 11PS 1-1/2 - 11PS 规格新规格Rp PS 1/16 - 28PS 1/8 - 28PS 1/4 - 19规格（UNFF)规格标准径2级牙钻孔径公制迫牙丝攻钻孔径美制迫牙丝攻钻孔径标准径2级牙钻孔径N P TN P S2级牙钻孔径标准径规格（UNF)规格标准径美制管螺纹钻孔径最大最小针车用螺纹美制特粗螺纹UNC美制细牙螺纹规格 （UNF)标准径2级牙钻孔径PT 规格新规格Rc标准长度（最小）中之毋螺牙内径使用绞刀时PS 2 - 11PS 3/8 - 19PF 11/4-11英制管螺纹滚造径4.0-4.2规格2BA 3BA3.0-3.22.7-2.82.4-2.54BA 5BA 6BA。
螺丝攻牙钻孔径和滚丝径规格对照表
17.5
17.678
17.323
M6.0×0.75 M6.0×0.5
5.3
5.378
5.188 2007/8/14
5.5
5.55
5.4 1月12日
20.5
20.675
20.27
23.2
23.571
23.114
M7.0×0.75 M7.0×0.5
6.3
6.378
6.188 1-1/8-12
6.5
6.55
3.3
3.422
3.242 2005/8/11
3.25
3.326
3.106 2003/4/10
3.8
3.878
3.688 2007/8/9
13.6
12.868
13.386
16.5
18.84
16.307
19.5
19.761
19.177
M5.0×0.8 M5.0×0.9 M6.0×1.0
4.2
4.334
2.487
M1.7×0.35
1.35
1.421
1.321
NO.632(3.505)
2.8
2.895
2.642
M1.8×0.35
1.45
1.521
1.421
NO832(4.166)3.43.533.302
M2.0×0.4
1.6
1.679
1.567
NO.1024(4.826)
3.9
3.962
3.683
M2.2×0.45
－
NO.4-40
2.5 －
－
NO.5-40
2.83 －
－
NO.6-32
螺纹攻牙钻孔径对照表
-18 12.90 13.081 12.751 3/8" -24
G7
9.10 8.99 5/8
-11 13.60 13.868 13.386
5/8
-18 14.50 14.681 14.351 7/16" -20
G8
10.62 10.48 3/4
-10 16.60 16.840 16.307
3/4
-16 17.50 17.678 17.323 1/2" -20
2.90 3.30 3.80 4.20 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 29.50 32.00 35.00
3.010 3.422 3.878 4.334 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 26.771 29.771 32.270 35.270
螺纹攻牙钻孔径对照表
公制粗螺纹
公制细螺纹
公制细螺纹
规格
标准径
2级牙钻孔径
最大
最小
规格
标准径
2级牙钻孔径
最大
最小
规格
标准径
2级牙钻孔径
最大
最小
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
螺丝攻下径对照表
切削丝攻公制粗牙(M)（通用）公制细牙(MF)1/2规格下孔径下孔径(%)规格下孔径下孔径(%) 60%100%60%100%M1.0 X0.250.750.840.73M1 X0.20.80.870.78 M1.1 X0.250.850.940.83M1.1 X0.20.90.970.88 M1.2 X0.250.95 1.040.93M1.2 X0.21 1.070.98 M1.4 X0.3 1.1 1.21 1.08M1.4 X0.2 1.2 1.27 1.18 M1.6 X0.35 1.25 1.37 1.22M1.6 X0.2 1.4 1.47 1.38 M1.7 X0.35 1.35 1.47 1.32M1.8 X0.2 1.6 1.67 1.58 M1.8 X0.35 1.45 1.57 1.42M2 X0.25 1.75 1.84 1.73 M2 X0.4 1.6 1.74 1.57M2.2 X0.25 1.95 2.07 1.93 M2.2 X0.45 1.75 1.01 1.71M2.5 X0.35 2.15 2.27 2.12 M2.3 X0.4 1.9 2.04 1.87M3 X0.35 2.65 2.77 2.62 M2.5 X0.45 2.05 2.21 2.01M3.5 X0.35 3.15 3.27 3.12 M2.6 X0.45 2.15 2.31 2.11M4 X0.5 3.5 3.68 3.46 M3 X0.5 2.5 2.68 2.46M4.5 X0.54 4.18 3.96 M3 X0.6 2.4 2.61 2.35M5 X0.5 4.5 4.68 4.46 M3.5 X0.6 2.9 3.11 2.85M5.5 X0.55 5.18 4.96 M4 X0.7 3.3 3.55 3.24M6 X0.5 5.5 5.68 5.46 M4 X0.75 3.25 3.51 3.19M6 X0.75 5.25 5.51 5.19 M4.5 X.75 3.75 4.01 3.69M7 X0.75 6.25 6.51 6.19 M5 X0.8 4.2 4.48 4.13M8 X0.757.257.517.19 M5 X0.9 4.1 4.7 4.03M8 X1.077.35 6.92 M6 X0.105 5.35 4.92M9 X1.088.357.92 M7 X0.106 6.35 5.92M10 X0.759.259.519.19 M8 X1.25 6.87.19 6.65M10 X1.099.358.92 M9 X1.257.88.197.65M10 X1.258.759.198.65 M10 X1.58.59.038.38M11 X1.01010.359.92 M11 X1.59.510.039.38M12 X0.7511.2511.5111.19 M12 X1.7510.210.8610.11M12 X1.01111.3510.92 M14 X2.01212.711.83M12 X1.2510.7511.1910.65 M16 X2.01414.713.83M12 X1.510.511.0310.38 M18 X2.515.516.3815.29M14 X1.01313.3512.92 M20 X2.517.518.3817.29M14 X1.2512.7513.1912.65 M22 X2.519.520.3819.29M14 X1.512.513.0312.38 M24 X3.02122.0520.75M15 X1.01414.3513.92 M27 X3.02425.0523.75M15 X1.2513.7514.1913.65 M30 X3.526.527.7326.21M15 X1.513.514.0313.38 M33 X3.529.530.7329.21M16 X1.01515.3514.92 M36 X4.03233.431.67M16 X1.2514.7515.1914.65 M39 X4.03536.434.67M16 X1.514.515.0314.38 M42 X4.537.539.0837.13M18 X1.01717.3516.92 M45 X4.540.542.0840.13M18 X1.2516.7517.1916.65 M48 X5.04344.7542.59M18 X1.516.517.0316.38 M52 X5.04748.7546.59M18 X2.01616.715.83 M56 X5.550.552.4350.05M20 X1.01919.3518.92 M60 X5.554.556.4354.05M20 X1.2518.7519.1918.65 M64 X65860.157.5M20 X1.518.519.0318.38 M68 X66264.161.5M20 X2.01818.717.83 M72 X66668.165.5M22 X1.02121.3520.92 M76 X67072.169.5M22 X1.2520.7521.1920.65M22 X1.520.521.0320.38公制细牙公制细牙(MF)2/2(MF)2/2挤压丝攻公制粗牙(M)M22 X2.02020.0719.83规格下孔径下孔径(%)M24 X1.02323.3522.92 60%100%M24 X1.2522.7523.1922.65M1 X0.250.90.920.86M24 X1.522.523.0322.38M1.1 X0.251 1.020.96M24 X2.02222.721.83M1.2 X0.25 1.1 1.12 1.06M25 X1.02424.1923.92M1.4 X0.3 1.25 1.3 1.24M25 X1.523.524.0323.38M1.6 X0.35 1.45 1.49 1.41M25 X2.02323.722.83M1.7 X0.35 1.55 1.59 1.51M26 X1.524.525.0324.38M1.8 X0.35 1.65 1.69 1.61M27 X1.02626.3525.92M2 X0.4 1.8 1.87 1.78M27 X1.525.526.0325.38M2.2 X0.452 2.05 1.96M27 X2.02525.724.83M2.3 X0.4 2.1 2.17 2.08M28 X1.526.527.0326.38M2.5 X0.45 2.3 2.35 2.26M28 X2.02626.725.83M2.6 X0.45 2.4 2.45 2.36M30 X1.02929.3528.92M3 X0.5 2.75 2.84 2.73M30 X1.528.529.0328.38M3.5 X0.6 3.2 3.31 3.18M30 X2.02828.727.83M4 X0.7 3.65 3.77 3.62M32 X1.530.531.0330.38M4.5 X0.75 4.15 4.26 4.09M33 X1.531.532.0331.38M5 X0.8 4.6 4.74 4.57M33 X2.03131.730.83 1 1 M6 X1.0 5.5 5.68 5.46M33 X3.03031.529.75 1 1 M7 X1.0 6.5 6.68 6.46M35 X1.533.534.0333.38M8 X1.257.357.597.32M36 X1.534.535.0334.38M9 X1.258.48.598.32M36 X2.03434.733.83M10 X1.59.259.519.19M36 X3.03334.0532.75M12 X1.7511.111.4311.05M38 X1.536.537.0336.38M39 X1.537.538.0337.38护套丝攻(M)M39 X2.03737.736.83规格下孔径下孔径(%)M39 X3.03637.0535.75最小最大M40 X1.538.539.0338.38M3 X0.5 3.1 3.11 3.22M40 X2.03838.737.83 M4 X0.7 4.2 4.15 4.29M40 X3.03738.0536.75 M5 X0.8 5.2 5.17 5.33M42 X1.540.541.0340.38 M6 X1.0 6.3 6.22 6.41M42 X2.04040.739.83 M8 X1.258.48.278.48M42 X3.03940.538.75 M10 X1.510.410.3210.56M42 X4.03840.737.66 M12 X1.7512.512.3812.64M45 X1.543.544.0343.38 M14 X2.014.514.4314.73M45 X2.04343.742.83 M16 X2.016.516.4316.73M45 X3.04243.0541.75 M18 X2.518.718.5418.9M45 X4.04142.440.67 M20 X2.520.720.5420.9M48 X2.04646.745.83M48 X3.04546.0544.75M48 X4.04445.443.67M50 X1.548.549.0348.38M50 X2.04848.747.83M50 X3.04748.0546.75M52 X1.550.551.0350.38M52 X2.05050.749.83M52 X3.04950.0548.75英制粗牙(W)美制粗牙(UNC)规格下孔径下孔径(%)规格下孔径下孔径(%) 60%100%60%100%W1/16 -60 1.2 1.26 1.05Nr.1 -64 1.5 1.6 1.42 W3/32 -48 1.8 1.97 1.7Nr.2 -56 1.8 1.89 1.69 W1/8 -40 2.6 2.69 2.36Nr.3 -48 2.1 2.17 1.94 W5/32 -32 3.1 3.36 2.95Nr.4 -40 2.3 2.43 2.16 W3/16 -24 3.6 3.95 3.41Nr.5 -40 2.6 2.76 2.49 W7/32 -24 4.5 4.74 4.2Nr.6 -32 2.75 2.99 2.65 W1/4 -20 5.1 5.37 4.72Nr.8 -32 3.5 3.65 3.31 W5/16 -18 6.5 6.85 6.13Nr.10 -24 3.8 4.14 3.68 W3/8 -167.98.317.49Nr.12 -24 4.5 4.8 4.34 W7/16 -149.39.728.791/4 -20 5.1 5.53 4.98 W1/2 -1210.511.079.995/16 -18 6.57.02 6.41 W9/16 -121212.6611.583/8 -167.98.497.81 W5/8 -1113.514.112.927/16 -149.39.939.15 W3/4 -1016.517.115.81/2 -1310.811.4310.58 W7/8 -919.2520.0618.619/16 -1212.212.9112 W12222.9621.335/8 -1113.514.3813.38 W 1 1/824.7525.7923.933/4 -1016.517.416.3 W 1 1/427.7528.9627.17/8 -919.520.3919.17 W 1 3/830.231.6729.5 1 -822.2523.3421.96 W 1 1/233.534.8532.68 1 1/4 -72829.3927.82 W 1 5/835.537.3734.77 1 3/8 -63132.1830.34 W 1 3/438.540.5537.94 1 1/2 -634.535.3533.52 W 1 7/841.543.2940.4 1 3/4 -53941.1538.95 W 244.546.4643.57 2 -4.54547.1344.69无屑丝攻英制粗牙(W)无屑丝攻美制粗牙(UNC)规格下孔径下孔径(%)规格下孔径下孔径(%) 60%100%60%100%W1/16 -60 1.4 1.42 1.32Nr.1 -64 1.7 1.73 1.64 W3/32 -48 2.1 2.18 2.04Nr.2 -562 2.04 1.94 W1/8 -40 2.85 2.93 2.77Nr.3 -48 2.25 2.34 2.23 W5/32 -32 3.55 3.66 3.46Nr.4 -40 2.55 2.64 2.5 W3/16 -24 4.25 4.36 4.08Nr.5 -40 2.9 2.97 2.83 W 7/32 -24 5.05 5.15 4.88Nr.6 -32 3.15 3.25 3.08 W1/4 -20 5.75 5.86 5.54Nr.8 -32 3.8 3.91 3.7 W5/16 -187.37.47.03Nr.10 -24 4.35 4.48 4.25 W3/8 -168.88.928.51Nr.12 -245 5.14 4.91 W7/16 -1410.310.429.951/4 -20 5.75 5.94 5.66 W1/2 -1211.7511.8911.345/16 -187.37.487.173/8 -168.89.018.67英制管牙7/16 -1410.310.5210.13规格PT(Rc)PS(Pp)PF(G)1/2 -1311.812.0711.64下孔径下孔径下孔径1/16 -28 6.3 6.5 6.7护套丝攻(UNC)1/8 -28 8.38.68.7规格下孔径下孔径(%)1/4 -191111.511.7最小最大3/8 -1914.51515.25Nr.4 -40 3.1 2.98 3.18 1/2 -1418.118.519Nr.6 -32 3.8 3.68 3.885/8 -1421Nr.8 -32 4.4 4.34 4.52 3/4 -1423.52424.5Nr.10 -24 5.2 5.05 5.28 7/8 -14281/4 -20 6.7 6.63 6.87 1 -1129.630.2530.55/16 -188.48.248.49 1 1/8 -1135.53/8 -16109.8710.13 1 1/4 -1138.13939.57/16 -1411.611.5111.78 1 1/2 -114444.9451/2 -1313.213.1213.391 3/4 -11519/16 -1214.914.7515.032 -1155.656.6575/8 -1116.516.3816.673/4 -1019.819.619.91美制管牙规格NPT NPS钢管牙(Pg)下孔径下孔径规格下孔径下孔径(%)1/16 -27 6.2 6.3560%100% 1/8 -278.58.75Pg7 -2011.411.7711.29 1/4 -181111.15Pg9 -181414.3913.85 3/8 -1814.514.7Pg11 -1817.417.7917.25 1/2 -141818.15Pg13.5 -1819.119.5919.05 3/4 -142323.4Pg16 -1821.321.6921.15 1 -11 1/22929.4Pg21 -1626.927.3926.79 1 1/4 -11 1/23838.1Pg29 -1635.636.0935.491 1/2 -11 1/24444.45Pg36 -1645.646.0945.492 -11 1/25656.4Pg42 -1652.653.0952.49美制细牙(UNF)规格下孔径下孔径(%) 60%100%Nr.0 -80 1.3 1.32 1.18 Nr.1 -72 1.6 1.62 1.47 Nr.2 -64 1.9 1.93 1.75 Nr.3 -56 2.1 2.22 2.02 Nr.4 -48 2.4 2.5 2.27 Nr.5 -44 2.7 2.8 2.55 Nr.6 -403 3.09 2.82 Nr.8 -36 3.5 3.71 3.4 Nr.10 -32 4.1 4.31 3.97 Nr.12 -28 4.7 4.9 4.5 1/4 -28 5.5 5.76 5.37 5/16 -24 6.97.25 6.79 3/8 -248.58.848.38 7/16 -209.910.299.74 1/2 -2011.511.8811.33 9/16 -1812.913.3712.76 5/8 -1814.514.9614.35 3/ 4 -1617.518.0217.33 7/8 -1420.2521.0520.26 1 -1223.2524.0323.11 1 1/8 -1226.527.226.28 1 1/4 -1229.530.3829.46 1 3/8 -123333.3532.63 1 1/2 -123636.7335.81无屑丝攻美制细牙(UNF)规格下孔径下孔径(%) 60%100%Nr.0 -80 1.4 1.42 1.35 Nr.1 -72 1.7 1.74 1.66 Nr.2 -642 2.06 1.97 Nr.3 -56 2.3 2.37 2.27 Nr.4 -48 2.6 2.67 2.56 Nr.5 -44 2.7 2.8 2.55 Nr.6 -40 3.2 3.3 3.16 Nr.8 -36 3.85 3.94 3.78 Nr.10 -32 4.45 4.57 4.4 Nr.12 -28 5.05 5.19 4.98 1/4 -28 5.95 6.06 5.86 5/16 -247.47.597.36 3/8 -2499.188.95 1/2 -2012.112.2912.01套丝攻(UNF)规格下孔径下孔径(%)最小最大Nr.4 -483 2.96 3.12 Nr.6 -40 3.7 3.64 3.82Nr.8 -36 4.4 4.32 4.5 Nr.10 -32 5.15 5.18 1/4 -28 6.6 6.55 6.72 5/16 -248.28.178.35 3/8 -249.89.759.93 7/16 -2011.511.3911.59 1/2 -2013.112.9813.18 9/16 -1814.714.5914.8 5/8 -1816.316.1816.39 3/4 -1619.519.3919.61美制号数牙之外径换算番数英寸公尺NR.00.06 1.524NR.10.073 1.854NR.20.086 2.184NR.30.099 2.515NR.40.112 2.845NR.50.125 3.175NR.60.138 3.505NR.80.164 4.166NR.100.19 4.826NR.120.216 5.486。
螺丝攻牙孔径对照表
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
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。
螺丝攻对照表
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
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 规格
螺丝攻牙钻孔径和滚造径对照表
美制迫牙丝攻钻孔径
G9
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、 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
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
英制螺纹
G9 8.81 10.30 11.82 10.54 12.13 规格 W1/8 - 40 W5/32 - 32 W3/16 - 24 W1/4 - 20 W5/16 - 18 W3/8 - 16 W7/16 - 14 W1/2 - 12 W9/16 - 12 W5/8 - 11 W3/4 - 10 W7/8 - 9 W1 -8 W1-1/8 - 7 W1-1/4 - 7 钻孔径 硬材 2.65 3.25 3.75 5.10 6.60 8.00 9.40 10.70 12.30 13.70 16.70 19.50 22.40 25.00 28.30 软材 2.60 3.20 3.70 5.00 6.50 7.90 9.30 10.50 12.00 12.50 13.50 16.50 19.30 24.80 28.00
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。
螺丝攻牙径对照表
美 制 细 牙 螺 纹
无 沟 丝 攻 钻 孔 径
度 等 级
螺丝攻牙钻孔径和
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
美制细牙螺纹美制细牙螺纹
英 制 螺 纹
若干。
细 牙 螺 纹
攻 无 沟 丝 攻 钻 孔 径
精英 制 管 螺 纹
针 车 用 螺 纹
孔径和滚造径对照表
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，对于所钻孔变更钻头直径。
本表是依据 2 级牙制订。
细 牙 螺 纹
英 制 管 螺 纹
英 制 管 螺 纹
公 制 螺 纹。
螺丝攻牙钻孔径和滚造径对照表
最大最小最大最小M1.0×0.250.750.7850.729NO.1-64(1.854) 1.55 1.582 1.425M1.1×0.250.850.8850.829NO.2-56(2.184) 1.80 1.871 1.695M1.2×0.250.950.9850.985NO.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 1.8671/4-20 5.10 5.257 4.979M2.5×0.45 2.10 2.138 2.0135/16-18 6.60 6.731 6.401M2.6×0.45 2.20 2.238 2.1133/8-168.008.1537.798M3.0×0.5 2.50 2.599 2.4597/16-149.409.559.144M3.0×0.6 2.40 2.440 2.2801/2-1310.8011.02310.592M3.5×0.6 2.90 3.010 2.8509/16-1212.2012.44611.989M4.0×0.7 3.30 3.422 3.2425/8-1113.6012.86813.386M4.0×0.75 3.25 3.326 3.1063/4-1016.5018.84016.307M4.5×0.75 3.80 3.878 3.6887/8-919.5019.76119.177M5.0×0.8 4.20 4.334 4.134122.2022.60621.971M5.0×0.9 4.10 4.170 3.9301-1/8-725.0025.34924.638M6.0×1.0 5.00 5.153 4.9171-1/4-728.2028.52427.813M7.0×1.0 6.00 6.153 5.9171-3/8-630.8031.11530.353M8.0×1.25 6.80 6.912 6.6471-1/2-634.0034.29033.528M9.0×1.257.807.9127.6471-3/4-539.5039.82738.964M10×1.58.508.6768.3762-4-1/245.2045.59344.679M11×1.59.509.6769.376M12×1.7510.3010.44110.106M14×2.012.0012.21011.835M16×2.014.0014.21013.835M18×2.515.5015.74415.294M20×2.517.5017.74417.294M22×2.519.5019.74419.294M24×3.021.0021.25220.752M27×3.024.0024.25223.752M30×3.526.5026.77126.211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M1.0×0.20.800.8210.783NO.0-80(1.524) 1.25 1.305 1.182M1.1×0.20.900.9210.883NO.1-72(1.854) 1.55 1.612 1.474M1.2×0.2 1.00 1.0210.983NO.2-64(2.184) 1.85 1.912 1.756M1.4×0.2 1.20 1.221 1.183NO.3-56(2.515) 2.10 2.197 2.025M1.6×0.2 1.40 1.421 1.383NO.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 2.1211/4-285.50 5.588 5.360M2.6×0.35 2.20 2.246 2.1865/16-246.907.035 6.782M3.0×0.35 2.70 2.721 2.6213/8-248.508.6368.382M3.5×0.35 3.20 3.221 3.1217/16-209.9010.0339.729M4.0×0.5 3.50 3.599 3.4591/2-2011.5011.60711.329M4.5×0.5 4.00 4.099 3.9599/16-1812.9013.08112.751M5.0×0.5 4.50 4.599 4.4595/8-1814.5014.68114.351M5.5×0.5 5.00 5.099 4.9593/4-1617.5017.67817.323M6.0×0.75 5.30 5.378 5.1887/8-1420.5020.67520.270M6.0×0.5 5.50 5.550 5.4001-1223.2023.57123.114M7.0×0.75 6.30 6.378 6.1881-1/8-1226.5026.74626.289M7.0×0.56.506.5506.4001-1/4-1229.5029.92129.464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M8.0×1.07.007.153 6.9171-3/8-1232.8033.09632.639M8.0×0.757.307.3787.1881-1/2-1236.0036.27135.814M8.0×0.57.507.5207.400M9.0×1.08.008.1537.917M9.0×0.758.308.3788.188M10×1.258.808.9128.647M10×1.09.009.1538.917M10×0.759.309.3789.188M10×0.59.509.5209.400M11×1.010.0010.1539.917M11×0.7510.3010.37810.188M12×1.510.5010.67610.376M12×1.2510.8010.91210.647M12×1.011.0011.15310.917M12×0.511.5011.52011.400M14×1.512.5012.67612.376M14×1.013.0013.15312.917M15×1.513.5013.67613.376M15×1.014.0014.15313.917M16×1.514.5014.67614.376M16×1.015.0015.15314.917M17×1.515.5015.67615.376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M17×1.016.0016.15315.917M18×2.016.0016.21015.835M18×1.516.5016.67616.376M18×1.017.0017.15316.917M20×2.018.0018.21017.835M20×1.518.5018.67618.376M20×1.019.0019.15318.917M22×2.020.0020.21019.835M22×1.520.5020.67620.376M22×1.021.0021.15320.917M24×2.022.0022.21021.835M24×1.522.5022.67622.376M24×1.023.0023.15322.917M25×2.023.0023.21022.835M25×1.523.5023.67623.376M25×1.024.0024.15323.917M26×1.524.5024.67624.376M27×2.025.0025.21024.835M27×1.525.5025.67625.376M27×1.026.0026.15325.917M28×2.026.0026.21025.835M28×1.526.5026.67626.376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M28×1.027.0027.15326.917M30×3.027.0027.25226.752M30×2.028.0028.21027.835M30×1.528.5028.67628.376M30×1.029.0029.15328.917M32×2.030.0030.21029.835M32×1.530.5030.67630.376M33×3.030.0030.25229.752M33×2.031.0031.21030.835M33×1.531.5031.67631.376M35×1.533.5033.67633.376M36×3.033.0033.25232.752M36×2.034.0034.21033.835M36×1.534.5034.67634.376规格标准径2级牙钻孔径规格（UNC）标准径2级牙钻孔径G4-G6G7-G8G9G4-G6G7-G8G9M1.0×0.250.860.88－NO.2-56UNC 1.94－－M1.1×0.250.960.98－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－－M1.7×0.35 1.51 1.53－NO.8-32 3.73 3.77－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 2.28－3/8-16－8.748.81M2.6×0.45 2.35 2.38－7/16-14－10.2010.30M3.0×0.5 2.73 2.75－1/2-13－11.2711.82M3.5×0.6 3.17 3.20－NO.2-64UNF 1.97－－M4.0×0.7 3.62 3.65 3.69NO.3-56 2.27－－M5.0×0.8 4.56 4.60 4.64NO.4-48 2.56－－M6.0×1.0 5.45 5.50 5.55NO.5-44 2.86－－M7.0×1.0 6.45 6.50 6.55NO.6-40 3.16－－M8.0×1.257.317.387.44NO.8-36 3.78－－M10×1.59.189.259.32NO.10-32 4.39 4.43－M10×1.259.319.389.44NO.12-28 4.99 5.04－M12×1.7511.0411.1211.211/4-28 5.85 5.90－M12×1.2511.3111.3811.445/16-247.367.41－3/8-24－9.00－7/16-20－10.4810.541/2-20－12.0712.13螺丝攻牙钻孔径和滚造径对照表公制迫牙丝攻钻孔径美制迫牙丝攻钻孔径规格精度等级规格精度等级最大最小NO.12-32 4.70 4.826 4.6232BA 4.0-41/4 -32 5.60 5.690 5.4863BA 5/16 -327.107.2647.0874BA 3.0-33/8 -328.708.8658.6615BA 2.7-27/16 -2810.2010.33810.1356BA2.4-21/2 -2811.8011.93811.7099/16 -2413.2013.38613.1325/8 -2414.8014.98614.7323/4 -2017.8017.95817.6787/8 -2021.0021.13320.8531 -2024.0024.30824.028美制特细螺纹英制电器螺纹规格钻孔规格(UNEF)标准径2级牙钻孔径使用绞刀时不用绞刀时PS 1/16 - 28 6.50 6.632 6.490PT 1/16 - 28 6.10 6.20 6.244 6.3841/16 - 27 6.10 6.25 6.35PS 1/8 - 288.508.6378.495PT 1/8 - 288.108.208.2498.3881/8 - 278.338.438.74PS 1/4 - 1911.4011.54911.341PT 1/4 - 1910.7011.0010.96211.1741/4 - 1810.7211.1311.13PS 3/8 - 1915.0015.05414.846PT 3/8 - 1914.2014.5014.44814.6583/8 - 1814.2714.2714.68PS 1/2 - 1418.5018.77318.489PT 1/2 - 1417.6018.0017.97918.2631/2 - 1417.4817.8618.26PS 3/4 -1424.0024.25923.975PT 3/4 - 1423.0023.5023.37823.6633/4 - 1422.6323.0123.42PS 1 - 1130.2030.47130.111PT 1- 1129.0029.5029.45929.822 1 - 11-1/228.5828.9829.36PS 1-1/4 - 1138.8039.13238.772PT 1-1/4 - 1137.5038.0037.97638.3391-1/4-11-1/237.3137.6938.10PS 1-1/2 - 1144.8045.02544.665PT 1-1/2 - 1143.4044.0043.86944.2321-1/2-11-1/243.6644.0444.45PS 2 - 1156.5056.83656.476PT 2 - 1154.9055.5055.41255.8442 - 11 - 1/255.5855.9656.36钻孔径最大最小使用纹刀时不用纹刀时NPTNPS 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规格标准径钻孔径规格螺丝攻牙钻孔径和滚造径对照表英制管螺纹英制管螺纹美制管螺纹硬材软材W 1/8 - 40 2.65 2.60M3×0.5 2.63-2.60SM1/8-40 2.735-2.688W 5/32 - 32 3.25 3.20M3.0×0.6 2.56-2.53SM1/8-44 2.769-2.722W 3/16 - 24 3.75 3.70M3.5×0.6 3.06-3.03SM9/64-40 3.128-3.083W 1/4 - 20 5.10 5.00M4.0×0.7 3.49-3.45SM11/64-40 3.855-3.805W 5/16 - 18 6.60 6.50M4.0×0.75 3.45-3.41SM3/16-32 4.205-4.155W 3/8 - 168.007.90M4.5×0.75 3.96-3.92SM3/16-28 4.143-4.093W 7/16 - 149.409.30M5.0×0.8 4.43-4.38SM7/32-32 5.003-4.955W 1/2 - 1210.7010.50M5.0×0.9 4.36-4.31SM15/64-28 5.325-5.570W 9/16 - 1212.3012.00M6.0×1.0 5.30-5.25SM1/4-40 5.890-5.735W 5/8 - 1113.7013.50M7.0×1.0 6.30-6.25SM1/4-28 5.721-5.366W 3/4 - 1016.7016.50M8.0×1.07.28-7.23SM9/32-28 6.508-6.648W 7/8 - 919.5019.30M8.0×1.257.12-7.07SM11/32-288.092-8.432W1 - 822.4022.00SM3/8-288.880-8.015W 1-1/8 - 725.0024.80SM7/16-2810.466-10.401W 1 - 1/4 - 728.3028.00SM7/16-1610.037-9.967SM1/2-2011.819-11.749SM9/26-2013.400-13.425规格滚造径规格(UNEF)钻孔径规格滚造径螺丝攻牙钻孔径和滚造径对照表英制螺纹公制螺纹针车用螺纹。
螺丝攻牙钻孔径和滚造径对照表
英 制 粗 螺 紋 規格(UNC) 滾造徑
NO.5 NO.6 NO.8 NO.10 NO.12 1/4 5/16 3/8 7/16 1/2 9/16 -40 2.70 -32 -32 -24 -24 -20 -18 -16 -14 -13 -12 2.95 3.60 4.09 4.75 5.50 6.98 8.45 9.89 11.39 12.87 2.67 - 2.91 - 3.57 - 4.05 - 4.70 - 5.45 - 6.93 - 8.40 - 9.83 - 11.32 - 12.80
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× 0.3 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 2.38 ── M3.0× 0.5 2.73 2.75 ── M3.5× 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× 1.25 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 注: 無槽溝絲攻之鑽孔徑，在上表所 列之數值，由於被加工材料之材 質、硬度、形狀、尺寸等之影響 ，多少會有所變動，因此於參考 上表之同時，亦請增減若干。
常用机械(自攻)螺丝公英制规格对照表
英制粗牙 55°
国标粗 牙60°
美制粗牙 60°
国标细 牙60°
美制细牙 60°
常用自攻螺丝规格表
类别 规格 M3.0 M3.5 M4.0 M4.5 M5.0 M6.0 M2.0 M2.3 M2.6 M3.0 M3.5 M4.0 M4.5 M5.0 M6.0 M8.0 M2.0 M2.3 M2.6 M3.0 M3.5 M4.0 M4.5 M5.0 M6.0 M8.0 M2.7 M3.1 M3.5 M3.8 M4.1 M4.5 M4.8 M5.1 M5.5 M5.8 牙距 或牙数 1.2 1.4 1.6 1.8 2.0 2.5 32 32 28 24 18 16 14 12 10 9 40 32 28 24 20 18 16 16 14 12 1.2 1.3 1.4 1.6 1.8 2.0 2.1 2.2 2.4 2.6 成品外径 最大 最小 3.0 2.85 3.5 3.35 4.0 3.85 4.5 4.35 5.0 4.85 6.0 5.85 2.10 2.00 2.40 2.30 2.70 2.60 3.10 3.00 3.65 3.50 4.15 4.00 4.65 4.50 5.20 5.00 6.20 6.00 8.20 8.00 2.00 1.90 2.30 2.20 2.60 2.50 3.00 2.90 3.50 3.40 4.00 3.85 4.50 4.35 5.00 4.85 6.00 5.85 8.00 7.85 2.77 2.63 3.17 3.03 3.60 3.40 3.90 3.70 4.20 4.00 4.60 4.40 4.92 4.68 5.22 4.98 5.62 5.38 5.92 5.68 线径 ±0.02mm 2.38 2.75 3.15 3.47 3.90 4.67 1.70 1.95 2.10 2.42 2.83 3.25 3.60 4.00 4.85 6.48 1.65 1.85 2.10 2.40 2.83 3.25 3.60 4.03 4.95 6.70 2.10 2.40 2.75 3.00 3.20 3.50 3.70 3.95 4.30 4.45 类别 规格 2# 3# 4# 5# 6# 7# 8# 9# 10# 12# 14# 2# 3# 4# 5# 6# 7# 8# 10# 12# 1/4# 6# 7# 8# 10# 6# 7# 8# 10# M2.5 M3.0 M3.5 M4.0 M4.5 M5.0 M6.0 牙距 或牙数 32 28 24 20 18 16 15 14 12 11 10 32 28 24 20 20 19 18 16 14 14 17 16 15 12 9 9 9 8 1.1 1.35 1.6 1.8 2.0 2.2 2.6 成品外径 最大 最小 2.23 2.13 2.56 2.46 2.89 2.79 3.30 3.20 3.58 3.45 4.01 3.86 4.26 4.11 4.55 4.40 4.92 4.77 5.60 5.46 6.45 6.29 2.23 2.08 2.56 2.46 2.89 2.74 3.30 3.20 3.53 3.43 3.91 3.78 4.21 4.04 4.80 4.65 5.46 5.31 6.25 6.05 3.60 3.40 4.00 3.75 4.30 4.05 4.95 4.70 3.90 3.65 4.20 3.90 4.60 4.30 5.30 4.90 2.5 2.25 3.0 2.75 3.5 3.20 4.0 3.70 4.5 4.20 5.0 4.70 6.0 5.70 线径 ±0.02mm 1.78 2.08 2.28 2.60 2.78 3.10 3.30 3.45 3.75 4.30 5.05 1.78 2.05 2.28 2.57 2.80 3.13 3.38 3.80 4.38 5.18 2.70 3.03 3.20 3.72 2.65 2.90 3.20 3.70 1.80 2.10 2.45 2.78 3.10 3.45 4.20
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。
螺丝攻牙径对照表
美 制 细 牙 螺 纹
无 沟 丝 攻 钻 孔 径
等 级
螺丝攻牙钻孔径和
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。
美制细牙螺纹美制细牙螺纹
英 制 螺 纹
若干。
细 牙 螺 纹
攻 无 沟 丝 攻 钻 孔 径
精英 制 管 螺 纹
针 车 用 螺 纹
孔径和滚造径对照表
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，对于所钻孔变更钻头直径。
本表是依据 2 级牙制订。
细 牙 螺 纹
英 制 管 螺 纹
英 制 管 螺 纹
公 制 螺 纹。
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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
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
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
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
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
0.86 0.96 1.06 1.24 1.41 1.51 1.61 1.78 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 11.31
0.88 0.98 1.08 1.25 1.43 1.53 1.63 1.80 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
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
0.785 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 3.878 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 26.771
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
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
3.69 4.64 5.55 6.55 7.44 9.32 9.44 11.21 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。
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
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 5.00 5.30 5.50 6.30 6.50 7.00 7.30 7.50 8.00 8.30 8.80 9.00 9.30 9.50 10.00 10.30 10.50 10.80
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
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 规格
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 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
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公制细螺纹
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
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
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