螺丝攻牙径对照表(集合版)
攻牙底孔径对照表
8.676
螺孔径
NO1 -64 2 -56 3 -48 4 -40 5 -40 6 -32 8 -32 10 -24 12 -24 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
切削丝攻（英制螺纹）
螺丝规格
钻头径
A列
B列
A列
（硬质材） （软质材） 直径%
咬合率%
B列
母螺纹
母螺纹
直径% 最大内径% 最小内径%
W 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 11/8 11/4 13/8 11/2
2.6 3.7 5.1 6.6 8.0 9.4 10.7 12.3 13.7 16.7 19.5 22.4 25.0 28.3 30.5 33.8
攻牙底 孔径对照
切削丝攻（公制粗牙）
切削丝攻（美制粗牙 UNC）
挤压丝攻（公制螺纹）
螺丝规格 钻头径
2级螺纹底孔径
最小尺寸 最大尺寸
M 1.0×0.25
1.1×0.25 1.2×0.25 1.4×0.3 1.6×0.35 1.7×0.35 1.8×0.35 2.0×0.4 2.2×0.45 2.3×0.4 2.5×0.45 2.6×0.45 3.0×0.6 3.0×0.5 3.5×0.6 4.0×0.75 4.0×0.7 4.5×0.75 5.0×0.9 5.0×0.8 5.5×0.9 6.0×1.0 7.0×1.0 8.0×1.25
11/4 -12
2.1 2.4
2.7
2.9 3.5 4.1 4.6 5.5 6.9 8.5 9.9 11.5 12.9 14.5 17.5 20.5 23.2 26.5
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
--
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
螺丝攻牙钻孔径和滚造径对照表
精度等级 G4－G6 G7－G8 G9
0.86 0.88 0.96 0.98 1.06 1.08 1.24 1.25 1.41 1.43 1.51 1.53 1.61 1.63 1.78 1.80 1.95 1.98 2.08 2.10 2.25 2.28 2.35 2.38 2.73 2.75 3.17 3.20 3.62 3.65 3.69 4.56 4.60 4.64 5.45 5.50 5.55 6.45 6.50 6.55 7.31 7.38 7.44 9.18 9.25 9.32 9.31 9.38 9.44 11.04 11.12 11.21 11.31 11.38 11.44
公制粗螺纹
公制细螺纹
无沟丝攻钻孔径
英制螺纹
美制粗螺纹
规格
标准径
2级牙钻孔径 最大 最小
规格
标准径
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
0.75 0.85 0.95 1.10 1.25 1.35 1.45 1.60 1.75 1.90
0.785 0.885 0.985 1.142 1.321 1.421 1.521 1.679 1.838 1.979
0.729 0.829 0.929 1.075 1.221 1.321 1.421 1.567 1.713 1.867
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
28.210 27.835
【精品】螺丝攻牙钻孔径和滚丝径对照表(可编辑
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
32.752
M36×2.0
34.00
34.210
33.835
M36×1.5
34.50
34.676
34.376
签名档：
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
G9
M1.0×0.25
0.86
0.88
－
NO.2-56UNC
10.441
10.106
M14×2.0
12.00
12.210
11.835
M16×2.0
14.00
14.210
13.835
M18×2.5
15.50
15.744
15.294
M20×2.5
17.50
17.744
17.294
M22×2.5
19.50
19.744
19.294
M24×3.0
21.00
21.252
14.50
14.681
14.351
M5.5×0.5
5.00
5.099
4.959
3/4-16
17.50
螺丝攻牙孔径对照表
公制细螺纹
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 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
螺丝攻牙钻孔径和滚造径对照表
精度本有表很所 大的影
公制粗螺纹
公制细螺纹
公制迫牙丝攻钻孔径
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*0.30 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
螺丝攻牙钻孔径和滚造径对照表
M2.6X0.45 2.20 2.238 2.113
M3.0X0.5 2.50 2.599 2.459
M3.0X0.6 2.40 2.440 2.280
M3.5X0.6 2.90 3.010 2.850
M4.0X0.7 3.30 3.422 3.242
M4.0X0.75 3.25 3.326 3.106
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
M10X0.5 9.50 9.520 9.400
M11X1.0 10.00 10.153 9.917
M11X0.75 10.30 10.378 10.188
M12X1.5 10.50 10.676 10.376
M12X1.25 10.80 10.912 10.647
规格
M12X1.0 M12X0.5 M14X1.5 M14X1.0 M15X1.5 M15X1.0 M16X1.5 M16X1.0 M17X1.5 M17X1.0 M18X2.0 M18X1.5 M18X1.0 M20X2.0 M20X1.5 M20X1.0 M22X2.0 M22X1.5 M22X1.0 M24X2.0 M24X1.5 M24X1.0 M25X2.0 M25X1.5 M25X1.0 M26X1.5 M27X2.0 M27X1.5 M27X1.0 M28X2.0 M28X1.5 M28X1.0 M30X3.0 M30X2.0 M30X1.5 M30X1.0 M32X2.0 M32X1.5 M33X3.0 M33X2.0 M33X1.5 M35X1.5 M36X3.0 M36X2.0 M36X1.5
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(集合版)
公 制 细 螺 纹 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 标准径 0.8 0.9 1 1.2 1.4 1.45 1.6 1.75 1.95 2.05 2.2 2级牙钻孔径 最大 0.821 0.921 1.021 1.221 1.421 1.5 1.621 1.785 1.985 2.061 2.221 最小 0.783 0.883 0.983 1.183 1.383 1.46 1.583 1.729 1.929 2.001 2.121 规格 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 标准径 14 14.5 15 15.5 16 16 16.5 17 18 18.5 19 2级牙钻孔径 最大 14.153 14.676 15.153 15.676 16.153 16.21 16.676 17.153 18.21 18.676 19.153 最小 13.917 14.376 14.917 15.376 15.917 15.835 16.376 16.917 17.835 18.376 18.917 规格（UNF) (螺丝牙外 径） 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.1024(4.826) No.1224(5.486) 2001-4-20
规格标准径规格标准径最大最小最大最小m1002507507850729m50084243344134m1102508508850829m601051534917m1202509509850929m701061535917m14031111421075m801256869126647m1603512513211221m901257879127647m1703513514211321m10158586768376m1803514515211421m11159596769376m20041616791567m121751031044110106m2204517518381713m142012122111835m23041919791867m162014142113835m250452121382013m18251551574415294m260452222382113m20251751774415294m30052525992459m22251951974419294m350629301285m2430212125220752m40073334223242m2730242425223752m450753838783688m30352652677126211规格标准径规格标准径最大最小最大最小m10020808210783m1510141415313917m11020909210883m16151451467614376m120210210983m1610151515314917m14021212211183m17151551567615376m16021414211383m1710161615315917m170214515146m182016162115835m18021616211583m18151651667616376m2002517517851729m1810171715316917m2202519519851929m202018182117835m2302520520612001m20151851867618376m250352222212121m2010191915318917m260352222462186m222020202119835m300352727212621m22152052067620376m350353232213121m2210212115320917m40053535993459m2
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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2.2 2.7 3.2 3.5 4 4.5 5 5.3 5.5 6.3 6.5 7 7.3 7.5 8 8.3 8.8 9 9.3 9.5 10 10.3 10.5 10.8 11 11.5 12.5 13 13.5
2.246 2.721 3.221 3.599 4.099 4.599 5.099 5.378 5.55 6.378 6.55 7.153 7.378 7.52 8.153 8.378 8.912 9.153 9.378 9.52 10.153 10.378 10.676 10.912 11.153 11.52 12.676 13.153 13.676
螺丝攻牙钻孔径和滚造径对照表 公 制 粗 螺 纹 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 M3.5*0.6 M4.0*0.7 M4.5*0.75 标准径 0.75 0.85 0.95 1.1 1.25 1.35 1.45 1.6 1.75 1.9 2.1 2.2 2.5 2.9 3.3 3.8 2级牙钻孔径 最大 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 3.01 3.422 3.878 最小 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 2.85 3.242 3.688 规格 M5.0*0.8 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 标准径 4.2 5 6 6.8 7.8 8.5 9.5 10.3 12 14 15.5 17.5 19.5 21 24 26.5 2级牙钻孔径 最大 4.334 5.153 6.153 6.912 7.912 8.676 9.676 10.441 12.21 14.21 15.744 17.744 19.744 21.252 24.252 26.771 最小 4.134 4.917 5.917 6.647 7.647 8.376 9.376 10.106 11.835 13.835 15.294 15.294 19.294 20.752 23.752 26.211 规格 （UNF) (螺丝牙外 径） No.080(1.524) No.172(1.854) No.264(2.184) No.356(2.515) No.448(2.845) No.544(3.175) No.640(3.505) No.836(4.166) No.1032(4.826) No.1228(5.846) 2001/4/28 5/16 -24
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 M228*1.5 M28*1.0 M30*3.0 M30*2.0 M30*1.5 M30*1.0 M32*2.0 M32*1.5 M33*3.0 M33*2.0 M33*1.5 M35*1.5 M36*3.0 M36*2.0 M36*1.5
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*1.5 M12*1.25 M12*1.0 M12*0.5 M14*1.5 M14*1.0 M15*1.5
美制迫牙丝攻钻孔径 规格 No. 2-56UNC No. 3-48 No. 4-40 No. 5-40 No. 6-32 No. 8-32 No.10-24 No.12-24 2001/4/20 5/16 -18 2003/8/16 7/16 -14 2001/2/13 精 度 等 级 G4-G6 2 2.23 2.5 2.83 3.175 3.73 4.24 4.9 _ _ _ _ _ _ _ _ _ _ G7-G8 _ _ _ _ _ _ _ _ _ _ 3.77 4.3 4.96 5.72 7.24 8.74 10.2 11.27 G9 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 8.81 10.3 11.82 规格 No. 2-64UNC No. 3-56 No. 4-48 No. 5-44 No. 6-40 No. 8-36 No.10-32 No.12-28 2001/4/28 5/16 -24 2003/8/24 7/16 -20 2001/2/20 精 度 等 级 G4-G6 1.97 2.27 2.56 2.86 3.16 3.78 4.39 4.99 5.85 7.36 _ _ _ _ _ _ G7-G8 _ _ _ _ _ _ _ _ _ _ _ _ 4.43 5.04 5.9 7.41 9 10.48 12.07 G9 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 10.54 12.13
20 20.5 21 22 22.5 23 23 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
20.21 20.676 21.153 22.21 22.676 23.153 23.21 23.676 24.153 24.676 25.21 25.676 26.153 26.21 26.676 27.153 27.252 28.21 28.676 29.153 30.21 30.676 31.21 31.21 31.676 33.676 33.252 34.21 34.676
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 30.835 30.835 31.376 33.376 32.752 33.835 34.376
M2.6*0.45 注：迫牙丝攻之钻孔径，在 有所变动，因此於参考上表
规格 PT 1/16 -28 PT 1/8 -28 PT 1/4 -19 PT 3/8 -19 PT 1/2 -14 PT 3/4 -14 PT 1 -11 PT 1-1/4-11 PT 1-1/2-11 PT 2 -11
英 制 管 螺 纹 钻孔径 规格 PC 1/16 -28 RP 1/8 -28 G 1/4 -19 共 3/8 19 用 1/2 -14 前 3/4 14 用 1 11 PS 1-1/4-11 1-1/2-11 2月11日 标准径 6.5 8.5 11.4 15 18.5 24 30.2 38.8 44.8 56.5 英 制 螺 纹 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 5.1 6.6 8 9.4 10.7 12.3 13.7 16.7 19.5 22.4 25 28.3 软材 2.6 3.2 3.7 5 6.5 7.9 9.3 10.5 12 13.5 16.5 19.3 22 24.8 28 规格 2BA 3BA 4BA 5BA 6BA 规格 最 大 6.632 8.637 11.549 15.054 18.773 24.259 30.471 39.132 45.025 56.836 最 小 6.49 8.495 11.341 14.846 18.489 23.975 30.111 38.772 44.665 56.476 规格 1/16 -27 2001/8/27 2001/4/18 2003/8/18 2001/2/14 2003/4/14 1 -11-1/2 1-1/4 -111/2 1-1/2 -111/2 2 -11-1/2
5/16 -18 2003/8/16 7/16 -14
规格（UNF) No.12-32 1/4 -32 5/16 -32 3/8 -32 7/16 -28 2001/2/28
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
公 制 细 螺 纹 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 标准径 0.8 0.9 1 1.2 1.4 1.45 1.6 1.75 1.95 2.05 2.2 2级牙钻孔径 最大 0.821 0.921 1.021 1.221 1.421 1.5 1.621 1.785 1.985 2.061 2.221 最小 0.783 0.883 0.983 1.183 1.383 1.46 1.583 1.729 1.929 2.001 2.121 规格 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 标准径 14 14.5 15 15.5 16 16 16.5 17 18 18.5 19 2级牙钻孔径 最大 14.153 14.676 15.153 15.676 16.153 16.21 16.676 17.153 18.21 18.676 19.153 最小 13.917 14.376 14.917 15.376 15.917 15.835 16.376 16.917 17.835 18.376 18.917 规格（UNF) (螺丝牙外 径） 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.1024(4.826) No.1224(5.486) 2001/4/20