螺纹攻牙底孔对照表
螺纹攻牙底孔参数
螺纹攻牙底孔参数攻牙底孔的使用参数表一、螺紋下孔徑表1、公制粗牙螺紋JIS B 0209-1982(單位：mm)螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑最小直径最大直径M1×0.25 0.75 0.78 (80%) 0.729 0.785 1.1 ×0.25 0.85 0.88 (80%) 0.829 0.885 1.2 ×0.25 0.95 0.98 (80%) 0.929 0.985 1.4 ×0.3 1.1 1.14 (80%) 1.075 1.142 1.6 ×0.35 1.25 1.32 (75%) 1.221 1.321 1.8 ×0.35 1.45 1.52 (75%) 1.421 1.521 2×0.4 1.6 1.65 (80%) 1.567 1.679 2.2 ×0.45 1.75 1.83 (75%) 1.713 1.838 2.5 ×0.45 2.1 2.13 (75%) 2.013 2.138 3×0.5 2.5 2.59 (75%) 2.459 2.599 3.5 ×0.6 2.9 3.01 (75%) 2.850 3.010 4×0.7 3.3 3.39 (80%) 3.242 3.422 4.5 ×0.75 3.8 3.85 (80%) 3.688 3.878 5×0.8 4.2 4.31 (80%) 4.134 4.334 6×15 5.13 (80%) 4.917 5.153 7×16 6.13 (80%) 5.917 6.153 8×1.25 6.86.85 (85%) 6.647 6.912 9×1.257.87.85 (85%) 7.647 7.912 10×1.58.5 8.62 (85%) 8.376 8.676 11×1.59.5 9.62 (85%) 9.376 9.676 12×1.75 10.3 10.40 (85%) 10.106 10.441 14×2 12 12.2 (85%) 11.835 12.210 16×2 14 14.2 (85%) 13.835 14.210 18×2.5 15.5 15.7 (85%) 15.294 15.744 20×2.5 17.5 17.7 (85%)17.294 17.744 22×2.5 19.5 19.2 (85%) 19.294 19.744 24×3 21 21.2 (85%) 20.752 21.252 27×3 24 24.2 (85%) 23.752 24.252 30×3.5 26.5 26.6 (90%) 26.211 26.771 33×3.5 29.5 29.6 (90%) 29.211 29.771 36×4 32 32.1 (90%) 31.670 32.270 39 ×4 35 35.1 (90%) 34.670 35.270 42 ×4.5 37.5 37.6 (90%) 37.129 37.799 45 ×4.5 40.5 40.6 (90%) 40.129 40.799 48 ×5 43 43.1 (90%) 42.587 43.297 註(1)M1.4以下等級：5H、M1.6以上等級：6H (2)基於JIS B 0209-1982標準2、公制細牙螺紋-01JIS B 0211-1982(單位：mm)螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑最小直径最大直径M2.5 ×0.35 2.2 2.22 (75%) 2.121 2.221 3×0.35 2.7 2.72 (75%) 2.621 2.7213.5 ×0.35 3.2 3.22 (75%) 3.121 3.2214×0.5 3.5 3.59 (75%) 3.459 3.5994.5 ×0.5 4 4.09 (75%) 3.959 4.0995×0.5 4.5 4.59 (75%) 4.459 4.5995.5 ×0.5 5 5.09 (75%) 4.959 5.0996×0.75 5.3 5.35 (80%) 5.188 5.3787×0.75 6.3 6.35 (80%) 6.188 6.3788×1 7 7.13 (80%) 6.917 7.1538×0.75 7.3 7.35 (80%) 7.188 7.3789×1 8 8.13 (80%) 7.917 8.1539×0.75 8.3 8.35 (80%) 8.188 8.37810×1.25 8.8 8.85 (85%) 8.647 8.91210×1 9 9.13 (80%) 8.917 9.15310×0.75 9.3 9.35 (80%) 9.188 9.37811 ×1 10 10.13 (80%) 9.917 10.15311 ×0.75 10.3 10.35 (80%) 10.188 10.37812 ×1.5 10.5 10.62 (85%) 10.376 10.676 12 ×1.25 10.8 10.85 (85%) 10.647 10.912 12 ×1 11 11.13 (80%) 10.917 11.15314 ×1.5 12.5 12.62 (85%) 12.376 12.67614 ×1 13 13.13 (80%) 12.917 13.15315 ×1.5 13.5 13.62 (85%) 13.376 13.67615 ×1 14 14.13 (80%) 13.917 14.15316 ×1.5 14.5 14.62 (85%) 14.376 14.67616 ×1 15 15.13 (80%) 14.917 15.15317 ×1.5 15.5 15.62 (85%) 15.376 15.676 17 ×1 16 16.13 (80%) 15.917 16.15318 ×2 16 16.2 (85%) 15.835 16.21018 ×1.5 16.5 16.62 (85%) 16.376 16.67618 ×1 17 17.13 (80%) 16.917 17.15320 ×2 18 18.2 (85%) 17.835 18.21020 ×1.5 18.5 18.62 (85%) 18.376 18.67620 ×1 19 19.13 (80%) 18.917 19.15322 ×2 20 20.2 (85%) 19.835 20.21022 ×1.5 20.5 20.62 (85%) 20.376 20.67622 ×1 21 21.13 (80%) 20.917 21.15324 ×2 22 22.2 (85%) 21.835 22.21024 ×1.5 22.5 22.62 (85%) 22.376 22.67624 ×1 23 23.13 (80%) 22.917 23.15325 ×2 23 23.2 (85%) 22.835 23.21025 ×1.5 23.5 23.62 (85%) 23.376 23.67625 ×1 24 24.13 (80%) 23.917 24.153公制細牙螺紋-02JIS B 0211-1982(單位：mm)螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑最小直径最大直径M26 ×1.5 24.5 24.62 (85%) 24.376 24.676 27 ×2 25 25.2(85%) 24.835 25.210 27 ×1.5 25.5 25.62 (85%) 25.376 25.67627 ×1 26 26.13 (80%) 25.917 26.15328 ×2 26 26.2(85%) 25.835 26.210 28 ×1.5 26.5 26.62 (85%) 26.376 26.676 28 ×1 27 27.13 (80%) 26.917 27.153 30 ×3 27 27.2 (85%) 26.752 27.252 30 ×2 28 28.2 (85%) 27.835 28.210 30 ×1.528.5 28.62 (85%) 28.376 28.676 30 ×1 29 29.13 (80%) 28.91729.153 32 ×2 30 30.2 (85%) 29.835 30.21032 ×1.5 30.5 30.62 (85%) 30.376 30.67633 ×3 30 30.2 (85%) 29.752 30.252 33 ×2 31 31.2 (85%) 30.835 31.210 33 ×1.5 31.5 31.62 (85%) 31.376 31.67635 ×1.5 33.5 33.62 (85%) 33.376 33.67636 ×3 33 33.2 (85%) 32.752 33.252 36 ×2 34 34.2 (85%) 33.835 34.210 36 ×1.5 34.5 34.62 (85%) 34.376 34.67638 ×1.5 36.5 36.62 (85%) 36.376 36.67639 ×3 36 36.2 (85%) 35.752 36.252 39 ×2 37 37.2 (85%) 36.835 37.21039 ×1.5 37.5 37.62 (85%) 37.376 37.67640 ×3 37 37.2 (85%) 36.752 37.252 40 ×2 38 38.2 (85%)37.835 38.210 40 ×1.5 38.5 38.62 (85%) 38.376 38.676 42 ×4 3838.1 (90%) 37.670 38.270 42 ×3 39 39.2 (85%) 38.752 39.252 42 ×2 40 40.2 (85%) 39.835 40.210 42 ×1.5 40.5 40.62 (85%) 40.37640.676 45 ×4 41 41.1 (90%) 40.670 41.270 45 ×3 42 42.2 (85%)41.752 42.252 45 ×2 43 43.2 (85%) 42.835 43.210 45×1.5 43.5 43.62 (85%) 43.376 43.676 48 ×4 44 44.1 (90%) 43.670 44.270 48 ×3 45 45.2 (85%) 44.752 45.252 48 ×2 46 46.2 (85%) 45.835 46.21048 ×1.5 46.5 46.62 (85%) 46.376 46.676 50 ×3 47 47.2 (85%) 46.752 47.252 50 ×2 48 48.2 (85%) 47.835 48.210 50 ×1.5 48.5 48.62 (85%) 48.376 48.676 註(1)等級：6H(2)基於JIS B 0211-1982標準3、美制粗牙螺紋(單位：mm)螺纹尺寸钻头直径2B级螺纹下孔徑內螺紋小徑最小直径最大直径NO.1 -64UNC 1.55 1.57 (65%) 1.425 1.5822 -56 1.8 1.86 (65%) 1.695 1.8713 -48 2.1 2.14 (65%) 1.941 2.1464 -40 2.3 2.36 (70%) 2.157 2.3855 -40 2.6 2.69 (70%) 2.487 2.6976 -32 2.8 2.86 (75%) 2.642 2.89510 -24 3.9 3.91 (80%) 3.683 3.96212 -24 4.5 4.57 (80%) 4.344 4.5971/4 -20 5.1 5.25 (80%) 4.979 5.257 5/16-18 6.6 6.72 (80%) 6.401 6.731 3/8 -16 8 8.15 (80%) 7.798 8.153 7/16 -14 9.4 9.50 (80%) 9.144 9.550 1/2 -13 10.8 11.0 (80%) 10.592 11.023 9/16 -12 12.2 12.3 (85%) 11.989 12.446 5/8-11 13.6 13.8 (85%) 13.38613.868 3/4-10 16.5 16.8 (80%) 16.307 16.840 7/8-9 19.5 19.6 (85%) 19.177 19.761 1 -8 22.2 22.5 (85%) 21.971 22.60611/8 -7 25 25.2 (85%) 24.638 25.349 11/4 -7 28.2 28.4 (85%) 27.813 28.524 13/8 -6 30.8 31.0 (85%) 30.353 31.115 11/2 -6 34 34.2 (85%) 33.528 34.290 13/4 -5 39.5 39.8 (85%) 38.964 39.8272 - 4 45.2 45.3 (90%) 44.679 45.593 4、美制細牙螺紋(單位：mm)螺纹尺寸钻头直径2B级螺纹下孔徑內螺紋小徑最小直径最大直径NO.0-80UNF 1.25 1.30 (65%) 1.182 1.3051 -72 1.55 1.61 (65%) 1.474 1.6122 -64 1.85 1.90 (65%) 1.756 1.9123 -56 2.1 2.17 (70%) 2.025 2.1974 -48 2.4 2.44 (70%) 2.271 2.4585 -44 2.7 2.74 (70%) 2.551 2.7406 -40 2.9 3.02 (70%) 2.820 3.0228 -36 3.5 3.59 (75%) 3.404 3.60610 -32 4.1 4.14 (80%) 3.963 4.16512 -28 4.6 4.70 (80%) 4.496 4.7241/4 -28 5.5 5.56 (80%) 5.360 5.5885/16-24 6.9 7.02 (80%) 6.782 7.0357/16-20 9.9 10.01 (80%) 9.729 10.0331/2 -20 11.5 11.60 (80%) 11.329 11.6079/16 -18 12.9 13.07 (80%) 12.751 13.0815/8 -18 14.5 14.65 (80%) 14.351 14.6813/4 -16 17.5 17.59 (85%) 17.323 17.6787/8 -14 20.5 20.6(85%) 20.270 20.6751-12 23.2 23.5(85%) 23.114 23.5711 1/8 -12 26.5 26.7(80%) 26.289 26.7461 1/4 -12 29.5 29.9(80%) 29.464 29.9211 3/8 -12 32.8 33.0(85%) 32.639 33.0961 1/2 -12 36 36.2(85%) 35.814 36.2715、英制粗牙螺紋(單位：mm)螺紋尺寸下孔徑嵌合率A列(硬材質) B列(軟材質)A列直徑B列直徑內螺紋最小徑內螺紋最大徑W 1/8 2.6 2.5 70.7 83.0 70.0 88.3 3/16 3.7 3.6 78.4 85.8 70.0 88.3 1/4 5.1 5.0 76.9 83.0 70.5 88.3 5/16 6.6 6.5 74.0 99.5 70.1 88.4 3/8 8.0 7.9 75.0 80.0 69.5 88.2 7/16 9.4 9.3 73.7 80.0 69.0 88.8 1/2 10.7 10.5 73.8 81.2 69.0 88.2 9/16 12.3 12.0 73.4 84.4 69.0 88.2 5/8 13.7 13.5 73.5 80.3 69.6 88.5 3/4 16.7 16.5 72.3 78.469.6 88.3 7/8 19.5 19.3 75.4 80.9 70.1 88.4 1 22.4 22.0 73.8 83.6 71.0 88.2 1 1/8 25.0 24.8 76.9 81.3 72.0 88.4 1 1/4 28.3 28.0 74.3 80.7 72.0 88.4 1 3/8 30.5 30.3 81.6 85.3 73.8 88.6 1 1/2 33.8 33.5 79.3 84.8 73.8 88.6 1 5/8 36.0 35.7 81.1 85.7 74.8 88.3 1 3/4 39.2 39.0 80.7 83.8 74.8 88.31 7/8 41.8 41.5 80.6 84.7 74.7 88.42 45.0 44.7 80.2 84.4 74.7 88.46、英制管用螺紋(單位：mm)管用螺紋尺寸JIS B 0203JIS B 2301錐管內螺紋Rc(PT) 平行內螺紋Rp(PS) 錐管內螺紋計算值下孔徑計算值下孔徑計算值下孔徑1/16 6.230 6.2 6.490 6.5 －－1/8 8.235 8.2 8.495 8.5 8.191 8.2 1/4 10.941 10.9 11.341 11.4 10.945 10.9 3/8 14.428 14.4 14.846 14.9 14.388 14.4 1/2 17.950 18 18.489 18.5 17.943 18 3/4 23.349 23 23.975 24 23.305 23 1 29.423 29 30.111 30 29.353 29 1 1/4 37.940 38 38.772 39 37.890 381 1/2 43.833 44 44.565 45 43.720 432 55.412 55 56.476 56 55.406 552 1/2 70.701 71 72.009 72 70.788 703 83.201 83 84.709 85 83.364 833 1/2 95.547 96 97.155 97 95.747 954 107.834 108 109.855 110 108.322 1085 133.110 133 135.255 135 133.597 1336 158.510 159 160.655 161 158.810 1587 183.360 183 185.954 1868 208.560 209 211.354 2129 233.960 234 236.754 23710 259.166 259 262.154 26212 309.747 310 312.875 3137、美制管用耐密斜行螺紋(NPTF?NPSF) (單位：mm)管用螺紋尺寸斜行螺紋(NPTF)平行螺紋(NPSF)鑽頭直徑鑽頭直徑使用鉸刀場合不使用鉸刀場合1/16 －0.234 ( 5.94) 0.246 ( 6.25) 1/4 0.250 ( 6.35)1/8 21/64 0.328 ( 8.33) 0.339 ( 8.61) 11/32 0.344 ( 8.74)1/4 27/64 0.422 (10.72) 7/16 0.438 (11.13) －0.444 (11.28)3/8 9/16 0.562 (14.27) 37/64 0.578 (14.68) 37/64 0.578 (14.68) 1/2 11/16 0.688 (17.48) 45/64 0.703 (17.86) 23/32 0.719 (18.26)3/4 57/64 0.891 (22.63) 59/64 0.922 (23.42) －0.922 (23.42)1 1 1/8 1.125 (28.58) 15/321.156 (29.36) 1 5/32 1.156 (29.36)1 1/4 1 15/32 1.469 (37.31) 11/21.500 (38.10) －－1 1/2 1 45/64 1.703 (43.26) 147/641.734 (44.04) －－2 2 3/16 2.188 (55.58) 27/322.219 (56.36) －－2 1/2 2 19/32 2.594 (65.89) 241/642.641 (67.08) －－上述鑽頭直徑來源於美制管用耐密斜行螺紋ANSI B1.20.3—1957 Dryseal Pipe Threads (Inch)標準8、公制螺紋(NRT) (單位：mm)螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑RH 精度最小～最大(嵌合率％)RH精度最小～最大(嵌合率％)M 1×0.25 2 0.87 ~ 0.89(100~85) 4 0.90 ~0.92 (100~80)1.1×0.25 2 0.97 ~ 0.99(100~85) 4 1.00 ~1.02 (100~80) 1.2×0.252 1.07 ~ 1.09(100~85) 4 1.10 ~1.12 (100~80) 1.4×0.3 2 1.244~ 1.263(100~85)4 1.270~1.294 (100~80)1.7×0.35 2 1.51 ~ 1.54(100~80) 4 1.54 ~ 1.58 (100~75)2 ×0.4 2 1.78 ~ 1.82(100~80) 4 1.81 ~ 1.85 (100~75) 2.3×0.4 2 2.08 ~ 2.12(100~80) 4 2.11 ~ 2.15 (100~75) 2.5×0.45 2 2.25 ~2.29(100~80) 4 2.28 ~ 2.33 (100~75)2.6×0.45 2 2.35 ~ 2.39(100~80) 4 2.38 ~ 2.43 (100~75)3 ×0.5 3 2.74 ~ 2.78(100~80)5 2.76 ~ 2.81 (100~75)3.5×0.6 3 3.18 ~ 3.21(100~85) 5 3.20 ~ 3.26 (100~75)4 ×0.7 4 3.63 ~ 3.67(100~85) 6 3.65 ~ 3.70 (100~85)5 ×0.8 4 4.57 ~ 4.62(100~85)6 4.59 ~ 4.66 (100~80)6 ×1 4 5.45 ~ 5.51(100~85)7 5.48 ~ 5.57 (100~80)7 ×1 4 6.45 ~ 6.51(100~85) 7 6.48 ~ 6.57 (100~80)8 ×1.25 5 7.31 ~ 7.38(100~85) 7 7.34 ~ 7.41 (100~85) 8 ×1 4 7.45 ~ 7.51(100~85) 7 7.48 ~ 7.57 (100~80) 10 ×1.5 5 9.16 ~ 9.22(100~90) 7 9.18 ~ 9.28 (100~85) 10 ×1.25 5 9.31 ~ 9.38(100~85) 7 9.34 ~ 9.41 (100~85) 10 ×1 5 9.46 ~ 9.52(100~85) 7 9.48 ~ 9.57 (100~80)12 ×1.75 5 11.01 ~11.08(100~90) 8 11.05 ~11.15(100~85)12 ×1.5 5 11.16 ~11.22(100~90) 7 11.18 ~11.28(100~85)12 ×1.25 5 11.31 ~11.38(100~85) 7 11.34 ~11.41(100~85)12 ×1 5 11.46 ~11.52(100~85) 7 11.48 ~11.57(100~80)14 ×2 6 12.83 ~12.95(100~90) 10 12.92 ~13.04(100~85)14 ×1.5 5 13.16 ~13.22(100~90) 9 13.21 ~13.30(100~85)16 ×2 6 14.87 ~14.95(100~90) 10 14.92 ~15.04(100~85)16 ×1.5 5 15.16 ~15.22(100~90) 9 15.21 ~15.30(100~80)18 ×2.5 6 16.57 ~16.67(100~90) 11 16.63 ~16.78(100~85)18 ×1.5 6 17.17 ~17.23(100~90) 10 17.22 ~17.31(100~85)20 ×2.5 6 18.57 ~18.67(100~90) 11 18.63 ~18.78(100~85)20 ×1.5 6 19.17 ~19.23(100~90) 10 19.22 ~19.31(100~85)9、美制粗牙螺紋(NRT) (單位：mm)螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑RH 精度最小～最大(嵌合率％)RH精度最小～最大(嵌合率％)NO.2-56UNC 4 1.96 ~ 2.02 (100~65) 3 1.95 ~ 2.01 (100~65) 3-48 4 2.25 ~ 2.32 (100~65) 3 2.23 ~ 2.31 (100~65) 4-40 5 2.52 ~ 2.60 (100~70) 3 2.50 ~ 2.58 (100~70) 5-40 5 2.86 ~ 2.93 (100~70) 3 2.83 ~ 2.91 (100~70) 6-32 5 3.09 ~ 3.17 (100~75) 3 3.06 ~ 3.14 (100~75) 8-32 6 3.75 ~ 3.83 (100~75) 4 3.74 ~ 3.82 (100~75) 10-24 6 4.26 ~ 4.35 (100~80) 4 4.24 ~ 4.32 (100~80) 12-24 6 4.92 ~ 5.01 (100~80) 4 4.90 ~ 4.96 (100~85) 1/4 -20 6 5.66 ~ 5.76 (100~80) 4 5.64 ~ 5.74 (100~80) 5/16 -18 7 7.18 ~7.29 (100~80) 5 7.15 ~7.24 (100~85) 3/8 -16 7 8.66 ~8.78 (100~80) 5 8.63 ~8.73 (100~85)7/16 -14 7 10.11 ~10.25(100~80) 5 10.08 ~10.19 (100~85)1/2 -13 8 10.62 ~11.78(100~80) 6 11.60 ~11.68 (100~90)9/16 -12 10 13.14 ~13.27(100~85) 8 13.11 ~13.24 (100~85)5/8 -11 11 14.62 ~14.76(100~85) 8 14.58 ~14.67 (100~90)3/4 -10 12 17.67 ~17.88(100~80) 9 17.63 ~17.74 (100~90)7/8 - 9 12 20.68 ~20.85(100~85) 9 20.64 ~20.75 (100~90)1 - 8 13 23.65 ~23.84(100~85) 10 23.61 ~23.74 (100~90)二、螺紋下孔徑表(無屑絲攻用)1、美制細牙螺紋(NRT) (單位：mm)螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑RH 精度最小～最大(嵌合率％)RH精度最小～最大(嵌合率％)NO.2-64UNF 3 1.98 ~ 2.04 (100~65) 2 1.97 ~ 2.03 (100~65) 3-56 4 2.29 ~ 2.35 (100~65) 3 2.28 ~ 2.34 (100~65)4-48 4 2.57 ~ 2.64 (100~70) 3 2.56 ~ 2.63 (100~70)5-44 4 2.88 ~ 2.95 (100~70) 3 2.87 ~ 2.94 (100~70)6-40 5 3.19 ~ 3.26 (100~70) 3 3.16 ~ 3.22 (100~75)8-36 5 3.80 ~ 3.88 (100~75) 4 3.79 ~ 3.86 (100~75) 10-32 5 4.41 ~ 4.48 (100~80) 4 4.40 ~ 4.46 (100~80) 12-28 5 5.00 ~ 5.08 (100~80) 4 4.99 ~ 5.06 (100~80) 1/4-28 5 5.86 ~ 5.93 (100~80) 4 5.85 ~ 5.92 (100~80) 5/16-24 6 7.38 ~7.46 (100~80) 5 7.36 ~7.43 (100~85) 3/8 -24 6 8.96 ~9.05 (100~80) 5 8.95 ~9.02 (100~85) 7/16-20 7 10.44 ~10.54 (100~80) 5 10.41 ~10.49 (100~85) 1/2-20 7 12.02 ~12.12 (100~80) 5 12.00 ~12.05 (100~90) 9/16-18 9 13.55 ~13.66 (100~80) 7 13.53 ~13.58 (100~90) 5/8 -18 9 15.14 ~15.25 (100~80) 7 15.11 ~15.17 (100~90) 3/4 -16 10 18.22 ~18.32 (100~85) 7 18.18 ~18.25 (100~90) 7/8 -14 11 21.27 ~21.38 (100~85) 8 21.23 ~21.27 (100~95)1 - 12 12 24.28 ~24.41 (100~85) 9 24.24 ~24.32 (100~90)2、英制管用平行螺紋(NRT) (單位：mm)螺紋尺寸RH精度最小～最大(嵌合率％)PF 1/8 6 9.24~9.35 (100~80)1/4 7 12.41~12.62 (100~75)3/8 7 15.92~16.12 (100~75)1/2 8 19.93~20.15 (100~80)3/4 8 25.41~25.64 (100~80)3、公制螺紋(HRT) (單位：mm)螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑RH 精度最小～最大(嵌合率％)RH精度最小～最大(嵌合率％)M 1×0.25 2 0.858~0.879(100~85)4 0.858~0.887 (100~80)1.2×0.25 2 1.058~1.079(100~85)4 1.058~1.087 (100~80) 1.4×0.3 2 1.23 ~1.26 (100~85) 4 1.23 ~1.26 (100~80) 1.6×0.35 2 1.40 ~1.44 (100~80) 4 1.40 ~1.45 (100~75) 1.7×0.35 －1.50 ~1.54 (100~80) 4 1.50 ~1.55 (100~75)1.8×0.35 2 1.60 ~1.64 (100~80) 4 1.60 ~1.65 (100~75)2 ×0.4 2 1.77 ~1.82 (100~80) 4 1.77 ~1.82 (100~80) 2 ×0.25 2 1.858~1.887(100~80)－1.858~1.887 (100~80) 2.3×0.4 － 2.07 ~2.12 (100~80) 4 2.07 ~2.13 (100~75) 2.5×0.45 3 2.24 ~2.30 (100~80) 5 2.24 ~2.31 (100~75)2.6×0.45 － 2.34 ~2.40 (100~80) 5 2.34 ~2.41 (100~75)3 ×0.6 3 2.72 ~2.73 (100~90) 5 2.66 ~2.73 (100~90) 3 ×0.5 52.72 ~2.77 (100~80) 6 2.72 ~2.78 (100~75)3 ×0.35 3 2.80 ~2.84 (100~80)5 2.80 ~2.85 (100~75)3.5×0.6 3 3.16 ~3.21 (100~85) 5 3.16 ~3.25 (100~75)4 ×0.75 3 3.57 ~3.64 (100~85)6 3.57 ~3.64 (100~85) 4 ×0.7 6 3.60 ~3.66 (100~85) 7 3.60 ~3.66 (100~85)4 ×0.5 3 3.71 ~3.77 (100~80)6 3.71 ~3.79 (100~75)5 ×0.9 3 4.49 ~4.59 (100~85) 7 4.49 ~4.59 (100~85) 5 ×0.8 34.55 ~4.62 (100~85) 8 4.55 ~4.64 (100~80)5 ×0.5 3 2.72 ~4.77 (100~80)6 4.72 ~4.79 (100~75)6 ×1 4 5.43 ~5.52 (100~85)7 5.43 ~5.55 (100~80) 6 ×0.75 3 5.57 ~5.64 (100~85) 7 5.57 ~5.66 (100~80)4、公制粗牙螺紋HL-NRT (單位：mm)螺紋尺寸RH精度最小～最大(嵌合率％) M 3 ×0.5 3 3.39~3.43 (100~80)4 ×0.7 4 4.54~4.58 (100~85)5 ×0.8 4 5.61~5.66 (100~85)6 ×1 4 6.75~6.81 (100~85) 8 ×1.25 5 8.93~9.01 (100~85) 10 ×1.5 5 11.11~11.17 (100~90) 10 ×1.25 5 10.93~11.01 (100~85) 12 ×1.75 5 13.28~13.17 (100~90) 12 ×1.5 5 13.11~13.17 (100~90) 12 ×1.255 12.93~13.01 (100~85)三、螺紋下孔徑表(護套螺紋用)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑M 2.5×0.45 2.60 2.65 2.62.6×0.45 2.70 2.75 2.73 ×0.5 3.12 3.20 3.14 ×0.7 4.17 4.30 4.25 ×0.8 5.16 5.33 5.26 ×1 6.25 6.42 6.3 8 ×1.25 8.31 8.52 8.4 10 ×1.5 10.37 10.62 10.5 12 ×1.75 12.43 12.73 12.514 ×2 14.49 14.83 14.5 16 ×2 16.49 16.83 16.5 18 ×2.5 18.58 19.04 19.0 20 ×2.5 20.58 21.04 21.0 22 ×2.5 22.58 23.04 23.0 24 ×2.5 24.70 25.25 25.02、公制細牙螺紋(單位：mm)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑M 10 ×1 10.25 10.42 10.310 ×1.25 10.31 10.52 10.412 ×1.25 12.31 12.52 12.512 ×1.5 12.37 12.62 12.514 ×1.5 14.37 14.62 14.516 ×1.5 16.37 16.62 16.518 ×1.5 18.37 18.62 18.520 ×1.5 20.37 20.62 20.520 ×2 20.47 20.83 20.522 ×1.5 22.37 22.62 22.524 ×1.5 24.37 24.62 24.524 ×2 24.47 24.83 24.530 ×1.5 30.37 30.62 30.5螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑NO. 2 –56UNC 2.29 2.39 2.33 –48 2.64 2.74 2.74 –40 2.95 3.07 3.05 –40 3.25 3.38 3.36 –32 3.66 3.81 3.78 –32 4.32 4.47 4.410 –24 5.05 5.21 5.112 –24 5.61 5.77 5.71/4 –20 6.63 6.78 6.75/16 –8 8.33 8.48 8.43/8 –16 9.91 10.11 10.07/16–14 11.51 11.76 11.51/2 –13 13.08 13.34 13.19/16–12 14.68 14.94 14.74、美制細牙螺紋(單位：mm)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑NO. 4 –48UNF 2.97 3.05 3.06 –40 3.66 3.78 3.78 –36 4.32 4.44 4.410 –32 4.98 5.13 5.01/4 –28 6.53 6.71 6.6 5/16 –24 8.20 8.38 8.23/8 –24 9.78 9.96 9.8 7/16 –20 11.43 11.63 11.51/2 –20 13.03 13.26 13.1 9/16 –18 14.66 14.88 14.7 5/8 –18 16.26 16.48 16.33/4 –16 19.43 19.68 19.57/8 –14 22.61 22.86 22.71 –12 25.76 26.04 26.0各種換算表管用螺絲基準寸法(mm)規格英制JIS(PT)美式ASA(NPT)山數外徑有效徑山數外徑有效徑1/167.723277.777.142 1/8289.7289.1472710.1169.4891/41913.15712.3011813.42712.4873/81916.66215.8061816.86615.9261/21420.95519.7931420.98019.7723/41426.44125.2791426.32625.11711133.24931.770111/233.93231.46111/41141.91040.431111/241.68940.21811/21147.80346.324111/247.68946.28721159.61458.135111/259.79658.32521/21175.18473.705872.27370.15931187.88486.405888.18286.06831/211100.33098.8518100.69198.776411113.030111.5518113.548111.433 41/211125.730124.251 511138.430136.9518141.3138.412 51/211151.130149.651611163.830162.3518168.3165.252 711189.230187.751811214.630213.1518219.1215.901美制螺絲外徑公厘(mm)換算表規格吋mmNO.00.0600 1.52410.0730 1.85420.0860 2.18430.0990 2.51540.1120 2.84550.1250 3.17560.1380 3.50580.1640 4.166100.1900 4.826120.2160 5.486山數節距換算表山數(每25.4mm) 節距mm100 0.254080 0.317572 0.352864 0.3969 60 0.4233 56 0.4536 48 0.5292 44 0.5773 40 0.6350 36 0.7056 32 0.7938 28 0.9071 24 1.0583 20 1.2700 18 1.4111 16 1.5875 14 1.8143 13 1.9538 12 2.1167 11 2.3091 10 2.54009 2.82228 3.17507 3.62866 4.23335 5.0800 4 1/2 5.64444 6.3500 3 1/2 7.2571 3 1/4 7.81543 8.4667 2 7/8 8.8348 2 3/4 9.2364 2 5/8 9.6762 2 1/2 10.1600。
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
超全螺纹攻牙钻孔直径和滚造直径对照表,值得收藏!
M17×1.0
16.00
16.153
15.917
M18×2.0
16.00
16.210
15.835
M18×1.5
16.50
16.670
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
39.50
39.827
38.964
2 -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
2.60
W5/32 - 32
3.25
3.20
W3/16 - 24
3.75
3.70
W1/4 - 20
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
1.40
1.421
1.383
M1.7×0.2
1.45
1.500
1.460
M1.8×0.2
1.60
螺纹孔底孔尺寸对照表
螺纹类型
底孔直径（mm）
加工方法
材料硬度
底孔深度（mm）螺Fra bibliotek孔长度（mm）
切削速度（m/min）
注意事项
M10
8.6-8.8
钻孔+攻丝
中等硬度以下
≥11.5
-
中等转速，适中的切削速度
检查钻头锋利度和夹紧装置完好性，适当冷却切削区，选择合适规格的钻头和丝锥
M12
9.8-10.2
钻孔+攻丝
同上
-8阳螺纹孔
-33-(-17)x2(-6-0)84
钻孔+扩孔
中高硬度材料
视材料厚度而定
视实际需要而定
视材料和加工条件而定
选择合适规格的钻头和扩孔钻，检查夹紧装置完好性，保持适当的冷却液供应，避免过度切削和热量积聚，检查切削刃的锋利度和完整性，注意安全操作规程。
中等硬度以下
≥13.5
-
中等转速，适中的切削速度
同上
M16
15.8-16.2
钻孔+攻丝
中等硬度以下
≥18.5
-
中等转速，适中的切削速度
同上
M20
19.8-20.2
钻孔+攻丝
中等硬度以下
≥23.5
-
中等转速，适中的切削速度
同上
M24
23.8-24.2
钻孔+攻丝
中等硬度以下
≥28.5
-
中等转速，适中的切削速度
螺丝攻牙钻孔经对照表
1.474 1.756 2.025 2.271 2.551 2.82 3.404 3.963 4.496 5.36 6.782 8.382 9.729 11.329 12.751 14.351 17.323 20.27 23.114 26.289 29.464 32.639 35.814
NO.2 NO.3 NO.4 NO.5 NO.6 NO.8 NO.10 NO.12 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-3/4 2
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（5.486）
1/4 -28
5/16 -24
规格
规格
1/16 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2
美制管
制细螺纹
2级牙钻孔径
最大
最小
1.305
1.182
美制粗螺纹
规格
标准
2级牙钻孔径
（UNC）
径 最大
最小
（螺丝牙外径）
NO.1 -64(1.854) 1.55 1.582 1.425
规格
SM1/16 SM5/64
规格
0.25 0.25 0.25 0.3 0.35 0.35 0.35 0.4 0.45 0.4 0.45 0.45 0.5 0.6 0.7 0.75 0.8
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
螺纹攻牙底孔对照表
No.4-40(2.845) No.5-40(3.175) No.6-32(3.505)
2.30 2.60 2.80
2.385 2.697 2.895
2.157 2.487 2.642
M1.0 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
G6
1/4〞 -20
G7
5/16〞 -18
G7
3/8〞 -16
G7
7/16〞 -14
G8
1/2〞 -13
G8
0 -80UNF G5
1 -72
G5
2 -64
G4
3 -56
G4
4 -48
G5
5 -44
G5
6 -40
G5
8 -36
G5
10 -32
G6
12 -28
G6
1/4〞 -28
G7
5/16〞 -24
G7
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*0.4 M2.2*0.45 M2.3*0.4 M2.5*0.45 M2.6*0.45 M3*0.5 M3.5*0.6 M4*0.7 M4.5*0.75 M5*0.8 M6*1.0 M7*1.0 M8*1.25 M9*1.25 M10*1.5 M11*1.5 M12*1.75 M14*2.0 M16*2.0
1/2-14 17.6 18.0 17.979 18.263
3/4-14 23.0 23.5 23.378 23.663
螺纹攻牙底孔对照表
32 / /
35 / /
37.5 / /
40.5 / /
43
表2 英制螺纹攻牙底孔对照表 螺纹规格 底孔孔径 N0.1-81 1.55 N0.2-56 1.8 N0.3-48 2.1
N0.03-56 2.1
N0.4-40 2.3
第2页，共3页
螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径
N0.10-32 3.8
3/16-14 9.4 .7/8-9 19.5 .13/4-5 39.5
3、质量检验
1、产品加工内螺纹时，应分清楚：加工后是否需要进行电镀处理。 2、镀前用相应规格“6Ｇ”的螺纹塞规进行检验，保证通规通，止规止的要求。 3、镀后用相应规格“6Ｈ”的螺纹塞规进行检验，保证通规通，止规止的要求。
N0.5-40 2.6 N0.12-24 4.5 1/2.-13 10.8 .11/8-7 25
N0.6-32 2.8 .1/4-20 5.1 .6/16-12 12.2 .11/4-7 28.2
N0.8-32 3.4 5/16-18 6.6 .5/8-11 13.5 .13/8-6 30.8
N0.10-24 3.8 3./8-16 8.2 .3/4-10 16.5 .11/2-6 34
1、适用范围
本规范适用于公所有产品内螺纹的加工及检测。
2、加工要求
1、内螺纹分公制内螺纹与英制内螺纹。 2、内螺纹的攻牙底孔，见表1、表2。 表1 公制螺纹攻牙底孔对照表 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 螺纹规格 底孔孔径 M1× 0.25 0.75 M1.7× 0.35 1.35 M2.5× 0.45 2.1 M4× 0.7 3.3 M6× 1 5 M11× 1.5 9.5 M20× 2.5 17.5 M33× 3.5 M1.1× 0.25 0.85 M1.8× 0.35 1.45 M2.6× 0.45 2.2 M4× 0.75 3.25 M7× 1 6 M12× 1.75 10.3 M22× 2.5 19.5 M36× 4 M1.2× 0.25 0.95 M2× 0.4 1.6 M3× 0.5 2.5 M4.5× 0.75 3.8 M8× 1.25 6.8 M14× 2 12 M24× 3 21 M39× 4 M1.4× 0.3 1.1 M2.2× 0.4 1.75 M3× 0.6 2.4 M5× 0.8 4.2 M9× 1.25 7.8 M16× 2 14 M27× 3 24 M42× 4.5 M1.6× 0.35 1.25 M2.3× 0.4 1.9 M3.5× 0.6 2.9 M5× 0.9 4.1 M10× 1.5 8.5 M18× 2.5 15.5 M30× 3.5 26.5 M45× 4.5
螺纹攻牙底孔对照表
PS 规格最大最小最大最小(新规格Rp)M1.0*0.250.750.7850.72911.0011.15310.9171-64UNC G5 1.76 1.68M1.00.25G40.920.891/16-28 6.5 6.632 6.490M1.1*0.250.850.8850.82911.5011.52011.4002-56G4 2.04 1.96M1.20.25G4 1.11 1.091/8-288.58.6378.495M1.2*0.250.950.9850.92912.5012.67612.3763-48G4 2.35 2.25M1.40.30G4 1.30 1.261/4-1911.411.54911.341M1.4*0.3 1.10 1.142 1.07513.0013.15312.9174-40G5 2.64 2.54M1.60.35G4 1.47 1.433/8-1914.915.05414.846M1.6*0.35 1.25 1.321 1.22113.5013.67613.3765-40G5 2.97 2.87M1.70.35G4 1.57 1.521/2-1418.618.77318.489M1.7*0.35 1.35 1.421 1.32114.0014.15313.9176-32G5 3.22 3.11M1.80.35G4 1.67 1.623/4-1424.024.25923.975M1.8*0.35 1.45 1.521 1.42114.5014.67614.3768-32G6 3.89 3.78M2.00.40G4 1.84 1.791-1130.230.47230.110M2*0.4 1.60 1.679 1.56715.0015.15314.91710-24G6 4.44 4.30M2.20.45G5 2.04 1.9811/4-1138.839.13338.771M2.2*0.45 1.75 1.838 1.71315.5015.67615.37612-24G6 5.07 4.96M2.30.40G4 2.14 2.0911/2-1144.745.02644.664M2.3*0.4 1.90 1.979 1.86716.0016.15315.9171/4〞-20G7 5.86 5.73M2.50.45G5 2.34 2.272-1156.556.83756.475M2.5*0.45 2.10 2.138 2.01316.0016.21015.8355/16〞-18G77.387.23M2.60.45G5 2.44 2.37M2.6*0.45 2.20 2.238 2.11316.5016.67616.3763/8〞-16G78.898.72M3.00.50G5 2.82 2.75M3*0.5 2.50 2.599 2.45917.0017.15316.9177/16〞-14G810.4010.02M3.50.60G5 3.27 3.19M3.5*0.6 2.90 3.010 2.85018.0018.21017.8351/2〞-13G811.9211.70M4.00.70G6 3.72 3.65M4*0.7 3.30 3.422 3.24218.5018.67618.3760-80UNF G5 1.45 1.39M5.00.80G6 4.67 4.59SM1/16 -80 1.25 1.281 1.211M4.5*0.75 3.80 3.878 3.68819.0019.15318.9171-72G5 1.77 1.70M6.0 1.00G7 5.59 5.49SM5/64 -64 1.55 1.593 1.513M5*0.8 4.20 4.334 4.13420.0020.21019.8352-64G4 2.06 1.98M7.0 1.00G7 6.59 6.48SM3/32 -56 1.9 1.936 1.841M6*1.0 5.00 5.153 4.91720.5020.67620.3763-56G4 2.37 2.29M8.0 1.25G77.497.36SM3/32-100 2.1 2.156 2.081M7*1.0 6.00 6.153 5.91721.0021.15320.9174-48G5 2.68 2.59M10 1.5G79.349.22SM1/8 -32 2.3(2.393)(2.233)M8*1.25 6.80 6.912 6.64722.0022.21021.8355-44G5 2.99 2.90M10 1.25G79.499.35SM1/8 -40 2.5 2.551 2.421M9*1.257.807.9127.64722.5022.67622.3766-40G5 3.29 3.19M12 1.75G811.2311.09SM1/8 -44 2.5 2.605 2.485M10*1.58.508.6768.37623.0023.15322.9178-36G5 3.91 3.81M12 1.25G911.5011.36SM1/8 -48 2.6 2.657 2.547M11*1.59.509.6769.37623.0023.21022.83510-32G6 4.53 4.44SM9/64 -32 2.7(2.790)(2.630)M12*1.7510.3010.44110.10623.5023.67623.37612-28G6 5.13 5.03SM9/64 -40 2.9 2.948 2.818M14*2.012.0012.21011.83524.0024.15323.9171/4〞-28G7 6.00 5.91SM11/64-32 3.5 3.584 3.424M16*2.014.0014.21013.83524.5024.67624.3765/16〞-24G77.537.42SM11/64-40 3.7 3.742 3.612M18*2.515.5015.74415.29425.0025.21024.8353/8〞-24G79.108.99使用铰刀时不使用铰刀时SM3/16 -24 3.6 3.658 3.498M20*2.517.5017.74417.29425.5025.67625.3767/16〞-20G810.6210.481/16-27 5.94 6.15 6.35SM3/16 -28 3.8 3.844 3.684M22*2.519.5019.74419.29426.0026.15325.9171/2〞-20G812.2012.061/8-278.338.438.74SM3/16 -32 3.9 3.980 3.820M24*3.021.0021.25220.75226.0026.21025.8351/4-1810.7211.1311.13SM3/16 -40 4.05 4.138 4.008M27*3.024.0024.25223.75226.5026.67626.3763/8-1814.2714.2714.68SM7/32-32 4.7 4.774 4.614M30*3.526.5026.77126.21127.0027.15326.9171/2-1417.4817.8618.26SM15/64-28 5.0 5.055 4.875M33*3.529.5029.77129.21127.0027.25226.752最大最小3/4-1422.6323.0123.42SM1/4-24 5.2 5.266 5.086M36*4.032.0032.27031.67028.0028.21027.835No.12-32 4.70 4.826 4.8231-11-1/228.5828.9829.36SM1/4-28 5.4 5.452 5.272M39*4.035.0035.27034.67028.5028.67628.3761/4-32 5.60 5.689 5.4871-1/4-11-1/237.3137.6938.10SM1/4-40 5.6 5.726 5.59629.0029.15328.9175/16-327.107.2647.0871-1/2-11-1/243.2643.6644.45SM9/32-20 5.7 5.824 5.63430.0030.21029.8353/8-328.708.8648.6622-11-1/255.1755.5856.36SM9/32-28 6.2 6.256 6.06630.5030.67630.3767/16-2810.2010.33710.135SM5/16-18 6.3 6.444 6.254最大最小30.0030.25229.7521/2-2811.8011.93811.710SM5/16-24 6.8 6.864 6.674M1.0*0.20.800.8210.78331.0031.21030.8359/16-2413.2013.38511.132SM5/16-28 6.97.050 6.860M1.1*0.20.900.9210.88331.5031.67631.3765/8-2414.8014.96814.732SM11/32-287.77.8437.653M1.2*0.2 1.00 1.0210.98333.5033.67633.3763/4-2017.8017.95717.679SM3/8-187.98.0537.843M1.4*0.2 1.20 1.221 1.18333.0033.25232.7527/8-2021.0021.13220.854(新规格Rc)使用铰刀时不使用铰刀时SM3/8-288.58.6378.447M1.6*0.2 1.40 1.421 1.38334.0034.21033.8351-2024.0024.30724.0291-16-28 6.1 6.2 6.244 6.384SM7/16-169.39.4409.220M1.7*0.2 1.45 1.500 1.46034.5034.67634.3761/8-288.18.28.2498.388SM7/16-2810.110.22410.034M1.8*0.2 1.60 1.621 1.5831/4-1910.711.010.96211.174SM1/2-1210.310.42010.180M2.0*0.25 1.75 1.785 1.7293/8-1914.214.514.44814.658SM1/2-2011.311.41011.190M2.2*0.25 1.95 1.985 1.929最大最小1/2-1417.618.017.97918.263SM1/2-2811.711.81211.622M2.3*0.35 2.05 2.061 2.001最大最小1.55 1.582 1.4253/4-1423.023.523.37823.663SM9/16-2012.913.01812.778M2.5*0.35 2.20 2.221 2.121 1.25 1.305 1.1821.80 1.871 1.6951-1129.029.529.45929.822M2.6*0.35 2.20 2.246 2.186 1.55 1.612 1.4742.10 2.146 1.941 1 1/4-1137.538.037.97638.339M3.0*0.35 2.70 2.721 2.621 1.85 1.912 1.7562.30 2.385 2.157 1 1/2-1143.444.043.86944.232M3.5*0.35 3.50 3.599 3.459 2.10 2.197 2.0252.60 2.697 2.4872-1154.955.555.41255.844硬材软材M4.5*0.5 4.00 4.0993.959 2.40 2.458 2.2712.80 2.895 2.642W1/8-40 2.65 2.60M5.0*0.5 4.50 4.599 4.459 2.70 2.740 2.5513.40 3.530 3.302PF 规格W5/32-32 3.25 3.20M5.5*0.5 5.00 5.0994.959 2.90 3.022 2.8203.90 3.962 3.683(新规格G)W3/16-24 3.75 3.70M6.0*0.5 5.50 5.550 5.400 3.50 3.606 3.4044.50 4.597 4.3441/16-28 6.7 6.843 6.561W1/4-205.10 5.00M6.0*0.75 5.30 5.378 5.188 4.10 4.165 3.9631/4-20 5.10 5.257 4.9791/8-288.78.8488.566W5/16-18 6.60 6.50M7.0*0.5 6.50 6.550 6.400 4.60 4.724 4.4965/16-18 6.60 6.731 6.4011/4-1911.711.89011.445W3/8-168.007.90M7.0*0.75 6.30 6.378 6.1881/4-28 5.50 5.588 5.3603/8-168.008.1537.7983/8-1915.215.39514.950W7/16-149.409.30M8.0*0.57.507.5207.4005/16-24 6.907.035 6.7827/16-149.409.5509.1441/2-1419.019.17218.631W1/2-1210.7010.50M8.0*0.757.307.3787.1883/8-248.508.6368.3821/2-1310.9011.02310.5925/8-1421.021.12820.587W9/16-1212.3012.00M8.0*1.07.007.153 6.9177/16-209.9010.0339.7299/16-1212.2012.44611.9893/4-1424.524.65824.117W5/8-1113.7013.50M9.0*0.758.308.3788.1881/2-2011.5011.60711.3295/8-1113.6013.86813.3867/8-1428.228.41827.877W3/4-1016.7016.50M9.0*1.08.008.1537.9179/16-1812.9013.08112.7513/4-1016.6016.84016.3071-1130.630.93130.291W7/8-919.5019.30M10*0.59.509.5209.4005/8-1814.5014.68114.3517/8-919.6019.76119.17711/8-1135.235.57934.939W1-822.4022.00M10*0.759.309.3789.1883/4-1617.5017.67817.3231-822.3022.60621.97111/4-1139.239.59238.952W1-1/8-725.0024.80M10*1.09.009.1538.9177/8-1420.5020.67520.2701-1/8-725.0025.34924.63811/2-1145.045.48544.845W1-1/4-728.3028.00M10*1.258.808.9128.6471-1223.3023.57123.1141-1/4-728.2028.52427.81313/4-1151.051.42850.788M11*1.010.0010.1539.9171-1/8-1226.5026.74626.2891-3/8-630.8031.11530.3532-1157.057.29656.656M11*0.7510.3010.37810.1881-1/4-1229.6029.92129.4641-1/2-634.0034.29033.528M12*1.510.5010.67610.3761-3/8-1232.8033.09632.6391-3/4-539.5039.82738.964M12*1.2510.8010.91210.6471-1/2-1236.0036.27135.8142-4-1/245.2045.59344.679标准径最大最小No.10-24(4.826)No.12-24(5.486)No.10-32(4.826)No.12-28(5.486)英制螺纹规格钻孔径螺 纹 攻 牙 底 孔 对 照 表PT 规格標准徑有效牙部之長度(最小)中之母螺牙內徑標准長度(最小)中之母螺牙內徑公制粗螺纹2级牙钻孔径规格标准径No.8-32(4.166)(UNEF)美制细螺纹No.4-40(2.845)No.5-40(3.175)美制粗螺纹标准径2级牙钻孔径M30*3.0M33*3.0No.6-32(3.505)规格(UNF)M15*1.0M16*1.5M22*1.5M22*1.0M24*2.0公制细螺纹M17*1.5M17*1.0M18*2.0M18*1.5M20*2.0M20*1.5M20*1.0M18*1.0M22*2.0公制细螺纹标准径2级牙钻孔径M16*1.0规格M12*1.0M12*0.5M14*1.5M14*1.0M15*1.5M24*1.5M24*1.0M25*2.0M25*1.5M25*1.0M26*1.5M27*2.0M27*1.5M27*1.0M28*2.0M28*1.5M28*1.0M32*1.5M33*2.0M36*1.5M30*2.0M30*1.5M30*1.0M32*2.0M33*1.5M35*1.5M36*3.0M36*2.0规格规格(UNC)No.2-64(2.184)No.8-36(4.166)规格规格标准径2级牙钻孔径No.3-56(2.515)No.4-48(2.845)No.5-44(3.175)No.6-40(3.505)美制迫牙丝攻钻孔径No.1-64(1.854)No.2-56(2.184)2级牙钻孔径精度最大最小美制特细螺纹标准径No.3-48(2.515)标准径2级牙钻孔径No.1-72(1.854)No.0-80(1.524)英制管螺纹标准径最大最小NPT 公制迫牙丝攻钻孔径规格精度最大最小NPS 美制管螺纹规格钻孔径針車用螺纹规格标准径最大最小。