螺纹实用型攻牙底孔
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
螺丝攻牙钻孔径标准
螺丝攻牙钻孔径标准
螺丝攻牙钻孔径标准是指在使用螺丝攻牙时，预先钻出的孔径大小的标准。
这个标准通常由螺丝的尺寸、螺距和材料等因素决定。
一般来说，孔径应该略大于螺丝的小径，以确保螺丝可以顺利地旋入孔内。
但是，如果孔径过大，螺丝的紧固力将会降低，从而影响连接的牢固性。
因此，选择正确的孔径非常重要。
在选择孔径时，可以参考相关的标准手册或规范，以确保选择的孔径符合要求。
同时，还应该考虑到材料的硬度和韧性等因素，以避免在攻牙过程中出现断丝或卡丝等问题。
螺丝攻牙钻孔径标准是确保螺丝连接牢固性和可靠性的重要因素，应该根据具体情况进行选择，并严格按照相关标准进行操作。
螺纹攻牙底孔选用作业标准
5.19
M10切屑式絲攻使用)
規格尺寸
底孔規格
規格尺寸
底孔規格
規格尺寸
底孔規格
W 1/16-60
1.3
W 3/16-24
3.8
W 3/8-16
8.0
W 3/32-48
1.9
W 7/32-24
4.5
W 7/16-14
9.4
W 1/8-40
2.6
W 1/4-20
5.1
M8*0.5
7.6
M1.7*0.35
1.42
M4.5*0.75
3.89
M8*0.75
7.4
M2*0.4
1.67
M5*0.5
4.62
M8*1
7.2
M2.3*0.4
1.97
M5*0.8
4.35
M8*1.25
6.9
M2.5*0.45
2.12
M5*0.9
4.17
M9*0.5
8.6
M2.6*0.45
2.22
M5.5*0.5
5.12
M9*0.75
8.4
M3*0.35
2.72
M5.5*0.75
4.9
M9*1
8.2
M3*0.5
2.59
M5.5*0.9
4.67
M9*1.25
7.9
M3*0.6
2.42
M6*0.5
5.6
M10*0.5
9.6
M3.5*0.35
3.22
M6*0.75
5.43
M10*0.75
9.4
M3.5*0.6
3.05
*****目 錄 *****
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M 1 ×0.25 0.75 0.78 (80%) 0.729 0.7851.1 ×0.25 0.85 0.88 (80%) 0.829 0.8851.2 ×0.25 0.95 0.98 (80%) 0.929 0.9851.4 ×0.3 1.1 1.14 (80%) 1.075 1.1421.6 ×0.35 1.25 1.32 (75%) 1.221 1.3211.8 ×0.35 1.45 1.52 (75%) 1.421 1.5212 ×0.4 1.6 1.65 (80%) 1.567 1.6792.2 ×0.45 1.75 1.83 (75%) 1.713 1.8382.5 ×0.45 2.1 2.13 (75%) 2.013 2.1383 ×0.5 2.5 2.59 (75%) 2.459 2.5993.5 ×0.6 2.9 3.01 (75%) 2.850 3.0104 ×0.7 3.3 3.39 (80%) 3.242 3.4224.5 ×0.75 3.8 3.85 (80%) 3.688 3.8785 ×0.8 4.2 4.31 (80%) 4.134 4.3346 × 1 5 5.13 (80%) 4.917 5.1537 × 1 6 6.13 (80%) 5.917 6.1538 × 1.25 6.8 6.85 (85%) 6.647 6.9129 × 1.25 7.8 7.85 (85%) 7.647 7.91210 × 1.5 8.5 8.62 (85%) 8.376 8.67611 × 1.5 9.5 9.62 (85%) 9.376 9.67612 × 1.75 10.3 10.40 (85%) 10.106 10.44114 × 2 12 12.2 (85%) 11.835 12.21016 × 2 14 14.2 (85%) 13.835 14.21018 × 2.5 15.5 15.7 (85%) 15.294 15.74420 × 2.5 17.5 17.7 (85%) 17.294 17.74422 × 2.5 19.5 19.2 (85%) 19.294 19.74424 × 3 21 21.2 (85%) 20.752 21.25227 × 3 24 24.2 (85%) 23.752 24.25230 × 3.5 26.5 26.6 (90%) 26.211 26.77133 × 3.5 29.5 29.6 (90%) 29.211 29.77136 × 4 32 32.1 (90%) 31.670 32.27039 × 4 35 35.1 (90%) 34.670 35.27042 × 4.5 37.5 37.6 (90%) 37.129 37.79945 × 4.5 40.5 40.6 (90%) 40.129 40.79948 × 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-01 JIS 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M 2.5 ×0.35 2.2 2.22 (75%) 2.121 2.2213 ×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 10.67612 × 1.25 10.8 10.85 (85%) 10.647 10.91212 × 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 15.67617 × 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-02 JIS 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M 26 × 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 27.15330 × 3 27 27.2 (85%) 26.752 27.252 30 × 2 28 28.2 (85%) 27.835 28.210 30 × 1.5 28.5 28.62 (85%) 28.376 28.676 30 × 1 29 29.13 (80%) 28.917 29.153 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 38 38.1 (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%) 40.376 40.676 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 2.8958 -32 3.4 3.52 (75%) 3.302 3.530 10 -24 3.9 3.91 (80%) 3.683 3.962 12 -24 4.5 4.57 (80%) 4.344 4.5971/4 -20 5.1 5.25 (80%) 4.979 5.2575/16 -18 6.6 6.72 (80%) 6.401 6.7313/8 -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%) 13.386 13.868 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 22.6061 1/8 - 7 25 25.2 (85%) 24.638 25.3491 1/4 - 7 28.2 28.4 (85%) 27.813 28.5241 3/8 - 6 30.8 31.0 (85%) 30.353 31.1151 1/2 - 6 34 34.2 (85%) 33.528 34.2901 3/4 - 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 7.0353/8 -24 8.5 8.61 (80%) 8.382 8.6367/16 -20 9.9 10.01 (80%) 9.729 10.033 1/2 -20 11.5 11.60 (80%) 11.329 11.607 9/16 -18 12.9 13.07 (80%) 12.751 13.081 5/8 -18 14.5 14.65 (80%) 14.351 14.681 3/4 -16 17.5 17.59 (85%) 17.323 17.678 7/8 -14 20.5 20.6 (85%) 20.270 20.675 1 -12 23.2 23.5 (85%) 23.114 23.571 1 1/8 -12 26.5 26.7 (80%) 26.289 26.746 1 1/4 -12 29.5 29.9 (80%) 29.464 29.921 1 3/8 -12 32.8 33.0 (85%) 32.639 33.096 1 1/2 -12 36 36.2 (85%) 35.814 36.271 5、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 78.4 69.6 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 88.4 6、英制管用螺紋(單位：mm)管用螺紋尺寸JIS B 0203 JIS 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) 1 5/32 1.156 (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) 2 7/32 2.219 (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) 1.2×0.25 2 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 最小～最大RH 最小～最大精度(嵌合率％) 精度(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 5 2.72 ~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 3 4.55 ~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 ×1.25 5 12.93~13.01 (100~85)三、螺紋下孔徑表(護套螺紋用)1、公制粗牙螺紋(單位：mm)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑M 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 6.38 × 1.25 8.31 8.52 8.414 × 2 14.49 14.83 14.516 × 2 16.49 16.83 16.518 × 2.5 18.58 19.04 19.020 × 2.5 20.58 21.04 21.022 × 2.5 22.58 23.04 23.024 × 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 30.53、美制粗牙螺紋(單位：mm)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑NO. 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 3.010 –32 4.98 5.13 5.01/4 –28 6.53 6.71 6.65/16 –24 8.20 8.38 8.23/8 –24 9.78 9.96 9.87/16 –20 11.43 11.63 11.51/2 –20 13.03 13.26 13.19/16 –18 14.66 14.88 14.75/8 –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1/16 7.723 27 7.77 7.142 1/8 28 9.728 9.147 27 10.116 9.489 1/4 19 13.157 12.301 18 13.427 12.487 3/8 19 16.662 15.806 18 16.866 15.926 1/2 14 20.955 19.793 14 20.980 19.772 3/4 14 26.441 25.279 14 26.326 25.1171 11 33.249 31.770 111/2 33.932 31.46111/4 11 41.910 40.431 111/2 41.689 40.218 11/2 11 47.803 46.324 111/2 47.689 46.2872 11 59.614 58.135 111/2 59.796 58.32521/2 11 75.184 73.705 8 72.273 70.1593 11 87.884 86.405 8 88.182 86.06831/2 11 100.330 98.851 8 100.691 98.7764 11 113.030 111.551 8 113.548 111.43341/2 11 125.730 124.2515 11 138.430 136.951 8 141.3 138.41251/2 11 151.130 149.6516 11 163.830 162.351 8 168.3 165.2527 11 189.230 187.7518 11 214.630 213.151 8 219.1 215.901美制螺絲外徑公厘(mm)換算表規格吋mmNO. 0 0.0600 1.5241 0.0730 1.8542 0.0860 2.1843 0.0990 2.5154 0.1120 2.8455 0.1250 3.1756 0.1380 3.5058 0.1640 4.16610 0.1900 4.82612 0.2160 5.486山數節距換算表山數(每25.4mm) 節距mm 100 0.254080 0.317572 0.352864 0.396960 0.423356 0.453648 0.529244 0.577340 0.635036 0.705632 0.793828 0.907124 1.058320 1.270018 1.411116 1.587514 1.814313 1.953812 2.116711 2.309110 2.54009 2.82228 3.17507 3.62866 4.23335 5.08004 1/2 5.64444 6.35003 1/2 7.25713 1/4 7.81543 8.46672 7/8 8.83482 3/4 9.23642 5/8 9.67622 1/2 10.1600。
攻牙孔径表
攻牙孔徑表公制牙 粗牙無溝絲攻適用孔徑螺紋牙套適用孔徑規格最小孔徑建議孔徑最小孔徑最大孔徑最小孔徑最大孔徑M 1*0.250.730.78M1.1*0.250.830.89M1.2*0.250.930.98M1.4*0.3 1.08 1.14 1.23 1.26M1.6*0.35 1.22 1.32M1.7*0.35 1.33 1.42 1.5 1.55M1.8*0.35 1.42 1.52M 2*0.4 1.57 1.67 1.77 1.83M2.2*0.45 1.71 1.84 1.95 2.01M2.3*0.4 1.87 1.97 2.07 2.13M2.5*0.45 2.01 2.14 2.25 2.31M2.6*0.45 2.12 2.23 2.35 2.41M 3*0.5 2.46 2.6 2.64 2.72 2.79 3.12 3.2M3.5*0.6 2.85 3.01 3.05 3.16 3.24M 4*0.7 3.24 3.42 3.47 3.6 3.69 4.17 4.3M4.5*0.75 3.69 3.88 3.92 4.07 4.17M 5*0.8 4.13 4.33 4.38 4.55 4.65 5.16 5.33 M 6*1.0 4.92 5.15 5.22 5.43 5.55 6.25 6.42 M 7*1.0 5.92 6.15 6.22 6.43 6.557.257.42 M 8*1.25 6.65 6.91 6.987.297.428.318.52 M 9*1.257.657.917.988.298.42M 10*1.58.388.688.759.159.310.3710.62 M 11*1.59.389.689.7510.1510.3M 12*1.7510.1110.4410.5311.0111.1912.4312.73 M 14*2.011.8412.2112.3114.4914.83 M 16*2.013.8414.2114.3116.4916.83 M 18*2.515.2915.7415.8518.5819.04 M 20*2.517.2917.7417.8520.5821.04 M 22*2.519.2919.7419.85M 24*3.020.7521.2521.38M 27*3.023.7524.2524.38M 30*3.526.2126.7726.92M 33*3.529.2129.7729.92M 36*4.031.6732.2732.42M 39*4.034.6735.2732.42M 42*4.537.1337.837.98M 45*4.540.1340.840.98M 48*5.042.5943.343.49公制牙 細牙無溝絲攻適用孔徑螺紋牙套適用孔徑規格最小孔徑建議孔徑最小尺寸最大尺寸最小孔徑最大孔徑M2.5*0.35 2.12 2.22 2.3 2.35M 3*0.35 2.62 2.72 2.8 2.85M3.5*0.35 3.12 3.22 3.3 3.35M 4*0.5 3.46 3.6 3.64 3.72 3.79M4.5*0.5 3.96 4.1 4.14 4.22 4.29M 5*0.5 4.46 4.6 4.64 4.72 4.79M5.5*0.5 4.96 5.1 5.14 5.22 5.29M 6*0.75 5.19 5.38 5.42 5.57 5.67M 7*0.75 6.19 6.38 6.42 6.57 6.67M 8*1.0 6.927.157.227.437.558.258.42 M 8*0.757.197.387.427.577.67M 9*1.07.928.158.228.438.55M 9*0.758.198.388.428.578.67M 10*1.258.658.918.989.299.4310.3110.52 M 10*1.08.929.159.229.439.5510.2510.42 M 10*0.759.199.389.429.579.67M 11*1.259.529.89.88M 11*1.09.9210.1510.2210.4310.55M 11*0.7510.1910.3810.4210.5710.67M 12*1.510.3810.6810.7511.1511.312.3712.62 M 12*1.2510.6510.9110.9811.2911.4312.3112.52 M 12*1.010.9211.1511.2211.4311.55M 14*1.512.3812.6812.7514.3714.4 M 14*1.012.9213.1513.22M 15*1.513.3813.6813.75M 15*1.013.9214.1514.22M 16*1.514.3814.6814.7516.3716.62 M 16*1.014.9215.1515.22M 17*1.515.3815.6815.75M 17*1.015.9216.1516.22M 18*2.015.8416.2116.31M 18*1.516.3816.6816.7518.3718.62 M 18*1.016.9217.1517.22M 20*2.017.8418.2118.31M 20*1.518.3818.6818.7520.3720.62 M 20*1.018.9219.1519.22M 22*2.019.8420.2120.31M 22*1.520.3820.6820.75M 22*1.020.9221.1521.22M 24*2.021.8422.2122.31M 24*1.522.3822.6822.75M 24*1.022.9223.1523.22M 25*2.022.8423.2123.31M 25*1.523.3823.6823.75M 25*1.023.9224.1524.22M 26*2.023.6324.0824.18M 26*1.524.3824.6824.75M 27*2.024.8425.2125.31M 27*1.525.3825.6825.75M 27*1.025.9226.1526.22M 28*2.025.8426.2126.31M 28*1.526.3826.6826.75M 28*1.026.9227.1527.22M 30*3.026.7527.2527.38M 30*2.027.8428.2128.31M 30*1.528.3828.6828.75M 30*1.028.9229.1529.22M 32*2.029.8430.2130.31M 32*1.530.3830.6830.75M 33*3.029.7530.2530.38M 33*2.030.8431.2131.31M 33*1.531.3831.6831.75M 35*1.533.3833.6833.75M 36*3.032.7533.2533.38M 36*2.033.8434.2134.31M 36*1.534.3834.6834.75M 38*2.035.6236.0836.18M 38*1.536.3836.6836.75M 39*3.035.7536.2536.38M 39*2.036.8437.2137.31M 39*1.537.3837.6837.75M 40*3.036.7537.2537.38M 40*2.037.8438.2138.31M 40*1.538.3838.6838.75M 42*4.037.6738.2738.42M 42*3.038.7539.2539.38M 42*2.039.8440.2140.31M 42*1.540.3840.6840.75M 45*4.040.6741.2741.42M 45*3.041.7542.2542.38M 45*2.042.8443.2143.31M 45*1.543.3843.6843.75M 48*4.043.6744.2744.42M 48*3.044.7545.2545.38M 48*2.045.8446.2146.31M 48*1.546.3846.6846.75M 50*3.046.7547.2547.38M 50*2.047.8448.2148.31英制牙 粗牙無溝絲攻適用孔徑螺紋牙套適用孔徑規格最小孔徑最大孔徑最小孔徑最大孔徑最小孔徑最大孔徑W 1/16-60 1.3W 3/32-48 1.9W 1/8 -40 2.6W 5/32-32 3.2W 3/16-24 3.8W 1/4 -205 5.1 5.63 5.77W 5/16-18 6.5 6.67.137.3W 3/8 -167.988.638.8W 7/16-149.39.410.0910.29W 1/2 -1210.510.711.611.82W 9/16 -121212.3W 5/8 -1113.513.7W 3/4 -1016.516.7W 7/8 -919.319.5W 1 -82222.4W1-1/8 -724.825W1-1/4 -72828.3W1-3/8 -630.330.5W1-1/2 -633.533.8W1-5/8 -535.736W1-3/4 -53939.2W1-7/8 -4.541.541.8W 2 -4.544.745美制牙 粗牙無溝絲攻適用孔徑螺紋牙套適用孔徑規格最小孔徑最大孔徑最小孔徑最大孔徑最小孔徑最大孔徑NO. 1-64UNC 1.43 1.58 1.63 1.71NO. 2-56UNC 1.69 1.87 1.93 2.02NO. 3-48UNC 1.94 2.15 2.22 2.32NO. 4-40UNC 2.16 2.39 2.49 2.61 2.95 3.07 NO. 5-40UNC 2.49 2.7 2.82 2.92 3.25 3.38 NO. 6-32UNC 2.64 2.9 3.05 3.19 3.66 3.81 NO. 8-32UNC 3.3 3.53 3.71 3.83 4.32 4.47 NO.10-24UNC 3.68 3.96 4.23 4.37 5.05 5.21 NO.12-24UNC 4.34 4.6 4.88 5.021/4 -20UNC 4.98 5.26 5.63 5.77 6.63 6.785/16-18UNC 6.4 6.737.137.38.338.483/8 -16UNC7.88.158.638.89.9110.11 7/16-14UNC9.149.5510.0910.2911.5111.76 1/2 -13UNC10.5911.0211.611.8213.0813.34 9/16-12UNC11.9912.4514.6814.94 5/8 -11UNC13.3913.8716.5916.84 3/4 -10UNC16.3116.8419.8420.09 7/8 -9 UNC19.1819.761-8 UNC21.9722.611-1/8 -7 UNC24.6425.351-1/4 -7 UNC27.8128.521-3/8 -6 UNC30.3531.121-1/2 -6 UNC33.5334.291-3/4 -5 UNC38.9639.832- 4 1/2UNC44.6845.59美制牙 細牙無溝絲攻適用孔徑螺紋牙套適用孔徑規格最小孔徑最大孔徑最小孔徑最大孔徑最小孔徑最大孔徑NO. 0-80UNF 1.18 1.31 1.34 1.41NO. 1-72UNF 1.47 1.61 1.65 1.72NO. 2-64UNF 1.76 1.91 1.96 2.04NO. 3-56UNF 2.02 2.2 2.26 2.35NO. 4-48UNF 2.27 2.46 2.55 2.64NO. 5-44UNF 2.55 2.74 2.85 2.95NO. 6-40UNF 2.82 3.02 3.15 3.24NO. 8-36UNF 3.4 3.61 3.77 3.86 4.32 4.44NO.10-32UNF 3.96 4.17 4.38 4.48 4.98 5.13NO.12-28UNF 4.5 4.72 4.97 5.081/4 -28UNF 5.36 5.59 5.83 5.95 6.53 6.715/16-24UNF 6.787.047.337.468.28.383/8 -24UNF8.388.648.939.089.789.967/16-20UNF9.7310.0310.3910.5411.4311.631/2 -20UNF11.3311.6111.9812.1213.0313.269/16-18UNF12.7513.085/8 -18UNF14.3514.6816.2616.483/4 -16UNF17.3217.6819.4319.687/8 -14UNF20.2720.671 -12UNF23.1123.571-1/8 -12UNF26.2926.751-1/4 -12UNF29.4629.921-3/8 -12UNF32.6433.11-1/2 -12UNF35.8136.27管用螺紋規格PF PS PT最小孔徑最大孔徑最小孔徑最大孔徑最小孔徑最大孔徑 1/88.578.858.58.648.118.251/411.4511.8911.3411.5510.7610.963/814.9515.414.8515.0514.2414.441/218.6319.1718.4918.7717.717.985/820.5921.133/424.1224.6623.9824.2623.123.387/827.8828.42130.2930.9330.1130.4729.129.46 1-1/834.9435.581-1/438.9539.5938.7739.1337.6237.981-1/244.8545.4944.6745.0343.5143.871-3/450.7951.43256.6657.356.4856.8455.0555.41規格NPT NPSC NPSM 1/88.48.89.0512929.830.5 1/411.111.511.85 1-1/437.738.539.2 3/814.314.915.3 1-1/24444.645.3 1/217.918.418.9525656.757.3 3/42323.824.3。
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
螺纹攻牙底孔选用作业重点标准
4.2【生產課】
4.2.1標準文献旳執行與回饋﹔
5. 作業內容﹕
5.1 絲攻簡介
5.1.1 絲攻類型
A.螺旋式
絲攻外型如鑽頭﹐螺旋式上升﹐此種絲攻其優點為﹐排屑方式為上排屑﹐一般用於盲孔攻牙
B.切屑式
絲攻外型有三外凹槽﹐凹槽旳作用為排屑之用﹐其排屑方式為下排屑﹐即切屑從下排出﹐一般用於通孔攻牙
DATE
日期
****** 修訂履歷 ******
版次
ECN NO.
修訂頁次
備註
A
新版發行
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
S
T
U
V
W
Y
Z
1. 目旳﹕
作業標准化﹐提高效率﹐保証品質。.
2. 適用范圍﹕
NWEIII產品事業處樣品廠
3. 引用文献﹕
無
4. 重要職責與權限﹕
4.1【製工課】﹕
4.1.1攻牙底孔標準旳建立與維護﹔
5.2.1公制牙抽牙
規格尺寸
底孔規格
規格尺寸
底孔規格
規格尺寸
底孔規格
M1*0.25
0.78
M4*0.5
3.62
M7*0.5
6.6
M1.2*0.25
0.98
M4*0.7
3.43
M7*0.75
6.4
M1.4*0.3
1.14
M4*0.75
3.31
M7*1
6.2
M1.6*0.35
1.32
M4.5*0.5
4.12
最全的攻牙底孔参数
4.959 5.188 6.188 6.917 7.188 7.917 8.188 8.647 8.917 9.188 9.917 10.188 10.376 10.647 10.917 12.376 12.917 13.376 13.917 14.376 14.917 15.376 15.917
5.099 5.378 6.378 7.153 7.378 8.153 8.378 8.912 9.153 9.378 10.153 10.378 10.676 10.912 11.153 12.676 13.153 13.676 14.153 14.676 15.153 15.676 16.153
18
18.2 (85%)
18.5
18.62 (85%)
19
19.13 (80%)
20
20.2 (85%)
20.5
20.62 (85%)
21
21.13 (80%)
22
22.2 (85%)
22.5
22.62 (85%)
23
23.13 (80%)
23
23.2 (85%)
23.5
23.62 (85%)
24
24.13 (80%)
攻牙底孔的使用参数表
1、公制粗牙螺紋
螺纹尺寸
钻头直径
M 1 × 0.25 1.1 × 0.25 1.2 × 0.25 1.4 × 0.3 1.6 × 0.35 1.8 × 0.35
2 × 0.4 2.2 × 0.45 2.5 × 0.45
3 × 0.5 3.5 × 0.6 4 × 0.7 4.5 × 0.75 5 × 0.8
3、美制粗牙螺紋
螺纹尺寸
钻头直径 2B级螺纹下孔徑
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
螺纹底孔与攻牙后的孔径对照表
M20x2.5-6H/7g (右手)-(单头螺纹)-(公制粗牙)
(公称直径20mm) (牙距2.5mm)
(内螺纹配合等级6H)
(外螺纹配合等级7g)
左-双头-M20x1.5 (左手)-(双头螺纹)-(公制细牙)
(公称直径20mm) (牙距1.5mm)
美制螺纹
(统一标准螺纹)
公制牙与英制牙的转换牙距P = 25.4 / (吋螺纹数n)
P = 25.4 / 10 = 2.54mm
因为工件材料及
刀具所决定的转速外径D = 3 / 4英吋= 25.4 * (3/4) =19.05MM
转速N = (1000周速V) / (圆周率p *直径D )
N = 1000V / pD = 1000 * 120 / (3.1416*19.05)
1 1/8英吋管用,每英பைடு நூலகம்16牙
管螺纹(美制NPT)
(牙角60度)
NPT 3/4-14 (锥形管螺纹)锥形管螺纹,锥度比1/16
3/4英吋管用,每英吋14牙
梯形螺纹
(30度公制)
TM40*6公称直径40mm牙距6.0mm
梯形螺纹
(29度爱克姆螺纹)
TW26*5外径26mm,每英吋5牙
方形螺纹
车牙的计算
牙深=
0.6495*(25.4/每吋牙数)
(牙角60度)
3/4-10UNC-2A
(UNC粗牙)(UNF细牙)
(1A 2A 3A外牙公差配合等级)
(1B 2B 3B内牙公差配合等级)
UNC美制统一标准粗牙螺纹
外径3/4英吋,每英吋10牙
外牙2级公差配合
管螺纹(英制PT)
牙深=
攻牙底孔的使用参数表
攻牙底孔的使用参数表一、螺紋下孔徑表RH 最小～最大RH 最小～最大精 度(嵌合率％)精 度(嵌合率％)NO. 2-56UNC4 1.96 ~ 2.02 (100~65)3 1.95 ~ 2.013-484 2.25 ~ 2.32 (100~65)3 2.23 ~ 2.314-405 2.52 ~ 2.60 (100~70)3 2.50 ~ 2.585-405 2.86 ~ 2.93 (100~70)3 2.83 ~ 2.916-325 3.09 ~ 3.17 (100~75)3 3.06 ~ 3.148-326 3.75 ~ 3.83 (100~75)4 3.74 ~ 3.8210-246 4.26 ~ 4.35 (100~80)4 4.24 ~ 4.32RH 最小～最大RH 最小～最大12-246 4.92 ~ 5.01 (100~80)4 4.90 ~ 4.96精度(嵌合率％)精度(嵌合率％)1/4-206 5.66 ~ 5.76 (100~80)4 5.64 ~ 5.74M 1 ×0.2520.87 ~ 0.89 (100~85)40.90 ~0.92 (100~80)5/16 -1877.18 ~ 7.29 (100~80)57.15 ~ 7.24(100~85)1.1×0.2520.97 ~ 0.99 (100~85)41.00 ~1.02 (100~80)3/8-1678.66 ~ 8.78 (100~80)58.63 ~ 8.73(100~85)1.2×0.252 1.07 ~ 1.09 (100~85)41.10 ~1.12 (100~80)7/16 -14710.11 ~10.25 (100~80)510.08 ~10.19(100~85)1.4×0.32 1.244~ 1.263 (100~85)41.270~ 1.294 (100~80)1/2-13810.62 ~11.78 (100~80)611.60 ~11.68(100~90)1.7×0.352 1.51 ~ 1.54 (100~80)41.54 ~ 1.58 (100~75)9/16 -121013.14 ~13.27 (100~85)813.11 ~13.24(100~85)2 ×0.42 1.78 ~ 1.82 (100~80)41.81 ~ 1.85 (100~75)5/8-111114.62 ~14.76 (100~85)814.58 ~14.67(100~90)2.3×0.42 2.08 ~ 2.12 (100~80)42.11 ~ 2.15 (100~75)3/4-101217.67 ~17.88 (100~80)917.63 ~17.74(100~90)2.5×0.452 2.25 ~ 2.29 (100~80)42.28 ~ 2.33 (100~75)7/8-91220.68 ~20.85 (100~85)920.64 ~20.75(100~90)2.6×0.452 2.35 ~ 2.39 (100~80)42.38 ~ 2.43 (100~75)1-81323.65 ~23.84 (100~85)1023.61 ~23.74(100~90)3 ×0.53 2.74 ~ 2.78 (100~80)52.76 ~ 2.81 (100~75)3.5×0.63 3.18 ~ 3.21 (100~85)53.20 ~ 3.26 (100~75)4 ×0.74 3.63 ~ 3.67 (100~85)63.65 ~ 3.70 (100~85)5 ×0.844.57 ~ 4.62 (100~85)64.59 ~ 4.66 (100~80)6 ×145.45 ~ 5.51 (100~85)75.48 ~ 5.57 (100~80)7 ×146.45 ~ 6.51 (100~85)76.48 ~ 6.57 (100~80)8 ×1.2557.31 ~ 7.38 (100~85)77.34 ~ 7.41 (100~85)8 ×147.45 ~ 7.51 (100~85)77.48 ~ 7.57 (100~80)(2)基於JIS B 0211-1982標準螺紋尺寸螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑8、公制螺紋(NRT) (單位：mm)2B 級螺紋用下孔徑3B 級螺紋用下孔徑9、美制粗牙螺紋(NRT) (單位：mm)10 ×1.559.16 ~ 9.22 (100~90)79.18 ~ 9.28 (100~85)10 ×1.2559.31 ~ 9.38 (100~85)79.34 ~ 9.41 (100~85)10 ×159.46 ~ 9.52 (100~85)79.48 ~ 9.57 (100~80)12 ×1.75511.01 ~11.08 (100~90)811.05 ~11.15 (100~85)12 ×1.5511.16 ~11.22 (100~90)711.18 ~11.28 (100~85)12 ×1.25511.31 ~11.38 (100~85)711.34 ~11.41 (100~85)12 ×1511.46 ~11.52 (100~85)711.48 ~11.57 (100~80)14 ×2612.83 ~12.95 (100~90)1012.92 ~13.04 (100~85)14 ×1.5513.16 ~13.22 (100~90)913.21 ~13.30 (100~85)16 ×2614.87 ~14.95 (100~90)1014.92 ~15.04 (100~85)16 ×1.5515.16 ~15.22 (100~90)915.21 ~15.30 (100~80)18 ×2.5616.57 ~16.67 (100~90)1116.63 ~16.78 (100~85)18 ×1.5617.17 ~17.23 (100~90)1017.22 ~17.31 (100~85)20 ×2.5618.57 ~18.67 (100~90)1118.63 ~18.78 (100~85)20 ×1.5619.17 ~19.23 (100~90)1019.22 ~19.31 (100~85)螺紋尺寸RH 精 度最小～最大(嵌合率％)RH 最小～最大RH 最小～最大PF 1/869.24~ 9.35 (100~80)精 度(嵌合率％)精 度(嵌合率％)1/4712.41~12.62 (100~75)NO. 2-64UNF3 1.98 ~2.04 (100~65)2 1.97 ~ 2.03 (100~65)3/8715.92~16.12 (100~75)3-564 2.29 ~ 2.35 (100~65)3 2.28 ~ 2.34 (100~65)1/2819.93~20.15 (100~80)4-484 2.57 ~ 2.64 (100~70)3 2.56 ~ 2.63 (100~70)3/4825.41~25.64 (100~80)5-444 2.88 ~ 2.95 (100~70)3 2.87 ~ 2.94 (100~70)6-405 3.19 ~ 3.26 (100~70)3 3.16 ~ 3.22 (100~75)8-365 3.80 ~ 3.88 (100~75)4 3.79 ~ 3.86 (100~75)10-325 4.41 ~ 4.48 (100~80)4 4.40 ~ 4.46 (100~80)RH 最小～最大RH 最小～最大12/285 5.00 ~ 5.08 (100~80)4 4.99 ~ 5.06 (100~80)精 度(嵌合率％)精 度(嵌合率％)1/4-285 5.86 ~ 5.93 (100~80)4 5.85 ~ 5.92 (100~80)M 1 ×0.2520.858~0.879 (100~85)40.858~0.887 (100~80)5/16-2467.38 ~ 7.46 (100~80)57.36 ~ 7.43 (100~85) 1.2×0.252 1.058~1.079 (100~85)4 1.058~1.087 (100~80)3/8-2468.96 ~ 9.05 (100~80)58.95 ~ 9.02 (100~85) 1.4×0.32 1.23 ~1.26 (100~85)4 1.23 ~1.26 (100~80)7/16-20710.44 ~10.54 (100~80)510.41 ~10.49 (100~85) 1.6×0.352 1.40 ~1.44 (100~80)4 1.40 ~1.45 (100~75)1/2-20712.02 ~12.12 (100~80)512.00 ~12.05 (100~90) 1.7×0.35－ 1.50 ~1.54 (100~80)4 1.50 ~1.55 (100~75)9/16-18913.55 ~13.66 (100~80)713.53 ~13.58 (100~90) 1.8×0.352 1.60 ~1.64 (100~80)4 1.60 ~1.65 (100~75)5/8-18915.14 ~15.25 (100~80)715.11 ~15.17 (100~90) 2 ×0.42 1.77 ~1.82 (100~80)4 1.77 ~1.82 (100~80)3/4-161018.22 ~18.32 (100~85)718.18 ~18.25 (100~90) 2 ×0.252 1.858~1.887 (100~80)－ 1.858~1.887 (100~80)7/8-141121.27 ~21.38 (100~85)821.23 ~21.27 (100~95) 2.3×0.4－ 2.07 ~2.12 (100~80)4 2.07 ~2.13 (100~75)1-121224.28 ~24.41 (100~85)924.24 ~24.32 (100~90)2.5×0.453 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 ×0.63 2.72 ~2.73 (100~90)5 2.66 ~2.73 (100~90)螺 紋 尺 寸RH 精 度最小～最大(嵌合率％) 3 ×0.55 2.72 ~2.77 (100~80)6 2.72 ~2.78 (100~75)M 3 ×0.533.39~3.43 (100~80)3 ×0.353 2.80 ~2.84 (100~80)5 2.80 ~2.85 (100~75)4 ×0.74 4.54~4.58 (100~85) 3.5×0.633.16 ~3.21 (100~85)53.16 ~3.25 (100~75)2B 級螺紋用下孔徑3B 級螺紋用下孔徑二、螺紋下孔徑表(無屑絲攻用)1、美制細牙螺紋(NRT) (單位：mm)2、英制管用平行螺紋(NRT) (單位：mm)螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑3、公制螺紋(HRT) (單位：mm)4、公制粗牙螺紋 HL-NRT (單位：mm)5 ×0.84 5.61~5.66 (100~85) 4 ×0.753 3.57 ~3.64 (100~85)6 3.57 ~3.64 (100~85)6 ×14 6.75~6.81 (100~85) 4 ×0.76 3.60 ~3.66 (100~85)7 3.60 ~3.66 (100~85)8 ×1.2558.93~9.01 (100~85)4 ×0.53 3.71 ~3.77 (100~80)6 3.71 ~3.79 (100~75)10 ×1.5511.11~11.17 (100~90)5 ×0.93 4.49 ~4.59 (100~85)7 4.49 ~4.59 (100~85)10 ×1.25510.93~11.01 (100~85) 5 ×0.83 4.55 ~4.62 (100~85)8 4.55 ~4.64 (100~80)12 ×1.75513.28~13.17 (100~90) 5 ×0.53 2.72 ~4.77 (100~80)6 4.72 ~4.79 (100~75)12 ×1.5513.11~13.17 (100~90) 6 ×14 5.43 ~5.52 (100~85)7 5.43 ~5.55 (100~80)12 ×1.25512.93~13.01 (100~85)6 ×0.753 5.57 ~5.64 (100~85)75.57 ~5.66 (100~80)最小直徑最大直徑最小直徑最大直徑M 2.5 × 0.45 2.6 2.65 2.6M 10 × 110.2510.4210.32.6 × 0.45 2.7 2.75 2.710 × 1.2510.3110.5210.43 × 0.53.12 3.2 3.112 × 1.2512.3112.5212.54 × 0.7 4.17 4.3 4.212 × 1.512.3712.6212.55 × 0.8 5.16 5.33 5.214 × 1.514.3714.6214.56 × 1 6.25 6.42 6.316 × 1.516.3716.6216.58 × 1.258.318.528.418 × 1.518.3718.6218.510 × 1.510.3710.6210.520 × 1.520.3720.6220.512 × 1.7512.4312.7312.520 × 220.4720.8320.514 × 214.4914.8314.522 × 1.522.3722.6222.516 × 216.4916.8316.524 × 1.524.3724.6224.518 × 2.518.5819.041924 × 224.4724.8324.520 × 2.520.5821.042130 × 1.530.3730.6230.522 × 2.522.5823.042324 × 2.524.725.2525最小直徑最大直徑最小直徑最大直徑NO. 2 – 56UNC 2.29 2.39 2.3NO. 4 – 48UNF 2.97 3.0533 – 48 2.64 2.74 2.7 6 – 40 3.66 3.78 3.74 – 40 2.95 3.0738 – 36 4.32 4.44 4.45 – 40 3.25 3.38 3.310 – 32 4.98 5.1356 – 32 3.66 3.81 3.71/4 – 28 6.53 6.71 6.68 – 32 4.32 4.47 4.45/16 – 248.28.388.210 – 24 5.05 5.21 5.13/8 – 249.789.969.812 – 24 5.61 5.77 5.77/16 – 2011.4311.6311.51/4 – 20 6.63 6.78 6.71/2 – 2013.0313.2613.15/16 – 88.338.488.49/16 – 1814.6614.8814.73/8 – 169.9110.11105/8 – 1816.2616.4816.37/16 – 1411.5111.7611.53/4 – 1619.4319.6819.51/2 – 1313.0813.3413.17/8 – 1422.6122.8622.79/16 – 1214.6814.9414.7 1 – 1225.7626.0426螺 紋 尺 寸下 孔 徑鑽 頭 直 徑2、公制細牙螺紋 (單位：mm)螺 紋 尺 寸下 孔 徑鑽 頭 直 徑三、螺紋下孔徑表(护套螺紋用)1、公制粗牙螺紋 (單位：mm)螺 紋 尺 寸下 孔 徑鑽 頭 直 徑4、美制細牙螺紋 (單位：mm)螺 紋 尺 寸下 孔 徑鑽 頭 直 徑3、美制粗牙螺紋 (單位：mm)規 格吋mm NO. 00.06 1.524山 數外 徑有效徑山 數外徑有效徑10.073 1.8541/167.723277.87.14220.086 2.1841/8289.7289.14727109.48930.099 2.5151/41913.15712.301181312.48740.112 2.8453/81916.66215.806181715.92650.125 3.1751/21420.95519.793142119.77260.138 3.5053/41426.44125.279142625.11780.164 4.16611133.24931.77111/23431.461100.19 4.8261 1/41141.9140.431111/24240.218120.2165.4861 1/21147.80346.324111/24846.28721159.61458.135111/26058.325山數節距換算表2 1/21175.18473.70587270.159山 數(每25.4mm)節 距mm 31187.88486.40588886.0681000.2543 1/211100.3398.851810198.776800.3175411113.03111.5518114111.433720.35284 1/211125.73124.251640.3969511138.43136.9518141138.412600.42335 1/211151.13149.651560.4536611163.83162.3518168165.252480.5292711189.23187.751440.5773811214.63213.1518219215.901400.635360.7056320.7938280.907124 1.058320 1.2718 1.411116 1.587514 1.814313 1.953812 2.116711 2.309110 2.549 2.82228 3.1757 3.62866 4.23335 5.084 1/2 5.64444 6.353 1/27.25713 1/47.815438.46672 7/88.8348美制螺絲外徑公厘(mm)換算表規 格英制JIS(PT)美式ASA(NPT)各 種 換 算 表管用螺絲基準寸法(mm)2 3/49.2364 2 5/89.6762 2 1/210.16。
螺牙攻牙底孔尺寸
螺牙尺 螺距 切削攻牙 公差 切削攻牙後 公差 擠壓攻牙前 公差 預沖孔 寸 前底孔尺 底孔尺寸 内孔尺寸 0.25 0.85 0.86 0.91 (+0,-0.04) M1 1 (+0,-0.03) (+0,-0.05) 0.5 1.02 1.03 1.09 (+0,-0.04) M1.2 1.2 0.25 (+0,-0.03) (+0,-0.05) 0.6 0.3 1.19 1.2 1.27 (+0,-0.04) M1.4 1.4 (+0,-0.03) (+0,-0.05) 0.7 1.36 1.38 1.46 (+0,-0.04) M1.6 1.6 0.35 (+0,-0.03) (+0,-0.05) 0.8 1.45 1.46 1.55 (+0,-0.04) M1.7 1.7 0.35 (+0,-0.03) (+0,-0.05) 0.85 0.4 1.7 1.72 1.82 (+0,-0.04) M2 2 (+0,-0.03) (+0,-0.05) 1 0.4 1.96 1.98 2.09 (+0,-0.04) M2.3 2.3 (+0,-0.03) (+0,-0.05) 1.15 2.13 2.15 2.28 (+0,-0.04) M2.5 2.5 0.45 (+0,-0.03) (+0,-0.05) 1.25 2.21 2.24 2.37 (+0,-0.04) M2.6 2.6 0.45 (+0,-0.03) (+0,-0.05) 1.3 0.5 2.55 2.58 2.73 (+0,-0.04) M3 3 (+0,-0.03) (+0,-0.05) 1.5 0.6 2.98 3.01 3.19 (+0,-0.04) M3.5 3.5 (+0,-0.03) (+0,-0.05) 1.75 0.7 3.4 3.44 3.64 (+0,-0.04) M4 4 (+0,-0.03) (+0,-0.05) 2 0.8 4.25 4.3 4.55 (+0,-0.04) M5 5 (+0,-0.03) (+0,-0.05) 2.5 1 5.1 5.16 5.46 (+0,-0.04) M6 6 (+0,-0.03) (+0,-0.05) 3 1 5.95 6.02 6.37 (+0,-0.04) M7 7 (+0,-0.03) (+0,-0.05) 3.5 1.25 6.8 6.88 7.28 (+0,-0.04) M8 8 (+0,-0.03) (+0,-0.05) 4 1.5 8.5 8.6 9.1 (+0,-0.04) M10 10 (+0,-0.03) (+0,-0.05) 5 備註：切削攻牙前底孔尺寸=螺牙尺寸*0.85 ；擠壓攻牙前内孔尺寸=螺牙尺寸*0.91 ; 預沖孔=螺牙尺寸*0.5; 切削攻牙後底孔尺寸=螺牙尺寸*0.86;擠壓攻牙後内孔尺寸=螺牙尺寸*0.88 廣泰常用擠壓絲攻攻牙底孔 螺牙尺寸 螺距 不鏽鋼材質 其他（Al、SECC、SGCC等） 公差 M2 0.4 1.87 1.82 (+0,-0.03) M2.5 0.45 2.35 2.275 (+0,-0.04) M3 0.5 2.85 2.73 (+0,-0.05) 備註：不鏽鋼材質=螺牙尺寸*0.94; 其他=螺牙尺寸*0.92;攻牙後底孔=螺牙尺寸*0.87 公差 (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) (+0.15,-0) 擠壓攻牙後 內孔尺寸 0.88 1.06 1.23 1.41 1.5 1.76 2.03 2.2 2.29 2.64 3.08 3.52 4.4 5.28 6.16 7.04 8.8 公差 (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05) (+0,-0.05)
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
无 沟 丝 攻 钻 1.1×0.25 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 M5.0×0.8 M6.0×1.0 M7.0×1.0 M8.0×1.25 M10×1.5 M10×1.25 M12×1.75 M12×1.25
M1.0×0.25 M1.1×0.25 M1.2×0.25 M1.4×0.3 M1.6×0.35 M1.7×0.35 M1.8×0.35 M2.0×0.4 M2.2×0.45 M2.3×0.4 M2.5×0.45 M2.6×0.45 M3.0×0.5 M3.0×0.6 M3.5×0.6 M4.0×0.7 M4.0×0.75 M4.5×0.75 M5.0×0.8 M5.0×0.9 M6.0×10 M7.0×10 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
NO.0-80(1.524) NO.1-72(2.184) NO.2-64(2.184) NO.3-56(2.515) NO.4-48(2.845) NO.5-44(3.175) NO.6-40(3.505) NO.8-36(4.166) NO.10-32(4.826) NO.12-28(5.846)
-20 -18 -16 -14 -13 -12 -11 -10 -9 -8 -7 -7 -6 -6 -5 -4-1/2
2级牙钻孔径 最 大 最 小 1.582 1.425 1.871 1.695 2.146 1.941 2.385 2.157 2.697 2.487 2.895 2.642 3.530 3.302 3.962 3.683 4.597 4.344 5.257 4.979 6.731 6.401 8.153 7.798 9.550 9.144 11.023 10.592 12.446 11.989 12.868 13.386 18.840 16.307 19.761 19.177 22.606 21.971 25.349 24.638 28.524 27.813 31.115 30.353 34.290 33.528 39.827 38.964 45.593 44.679
M12×1.0 M12×0.5 M14×1.5 M14×1.0 M15×1.5 M15×1.0 M16×1.5 M16×1.0 M17×1.5 M17×1.0 M18×2.0 M18×1.5 M18×1.0 M20×2.0 M20×1.5 M20×1.0 M22×2.0 M22×1.5 M22×1.0 M24×2.0 M24×1.5 M24×1.0 M25×2.0 M25×1.5 M25×1.0 M26×1.5 M27×2.0 M27×1.5 M27×1.0 M28×2.0 M28×1.5 M28×1.0 M30×3.0 M30×2.0 M30×1.5 M30×1.0 M32×2.0
滚 造 径 2.735-2.688 2.769-2.722 3.128-3.083 3.855-3.805 4.205-4.155 4.143-4.093 5.003-4.955 5.325-5.570 5.890-5.735 5.721-5.366 6.508-6.648 8.092-8.432 8.880-8.015 10.466-10.401 10.037-9.967 11.819-11.749 13.400-13.425
美 制 特 细 螺 纹 2级牙钻孔径 标 准 径 最 大 最 小
规 格
NO.12 1/4 5/16 7/16 1/2 9/16 5/8 3/4 7/8 1
-32 -32 -32 -28 -28 -24 -24 -20 -20 -20
4.70 5.60 7.10 10.20 11.80 13.20 14.80 17.80 21.00 24.00
规
格
标 准 径 0.75 0.85 0.95 1.10 1.25 1.35 1.45 1.60 1.75 1.90 2.10 2.20 2.50 2.40 2.90 3.30 3.25 3.80 4.20 4.10 5.00 6.00 6.80 7.80 8.50 9.50 10.30 12.00 14.00 15.50 17.50 19.50 21.00 24.00 26.50
6.35 8.74 14.65 18.26 23.42 29.36 38.10 44.45 56.36
美 制 粗 螺 纹
NO.1 NO.2 NO.3 NO.4 NO.5 NO.6 NO.8 NO.10 NO.12
规 格 (UNC)
标 准 径 1.55 1.80 2.10 2.30 2.60 2.80 3.40 3.90 4.50 5.10 6.60 8.00 9.40 10.80 12.20 13.60 16.50 19.50 22.20 25.00 28.20 30.80 34.00 39.50 45.20
N P S
1/16 -27 1/8 -27 3/8 -18 1/2 -14 3/4 -14 1 -11-1/2
1-1/4 1-1/2 -11-1/2 -11-1/2
2
-11-1/2
6.10 8.33 14.27 17.48 22.63 28.58 37.31 43.66 55.58
6.25 8.43 14.27 17.86 23.01 28.98 37.69 44.04 55.96
公 制 细 螺 纹
公 制 粗 螺 纹
规
格
标 准 径 11.00 11.50 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.00 16.50 17.00 18.00 18.50 19.00 20.00 20.50 21.00 22.00 22.50 23.00 23.00 23.50 24.00 24.50 25.00 25.50 26.00 26.00 26.50 27.00 27.00 28.00 28.50 29.00 30.00
2级牙钻孔径 最 大 最 小 0.785 0.729 0.885 0.829 0.985 0.929 1.142 1.075 1.321 1.221 1.421 1.321 1.521 1.421 1.679 1.567 1.838 1.713 1.979 1.867 2.138 2.013 2.238 2.113 2.599 2.459 2.440 2.280 3.010 2.850 3.422 3.242 3.326 3.106 3.878 3.688 4.334 4.134 4.170 3.930 5.153 4.917 6.153 5.917 6.912 6.647 7.912 7.647 8.676 8.376 9.676 9.376 10.441 10.106 12.210 11.835 14.210 13.835 15.744 15.294 17.744 17.294 19.744 19.294 21.252 20.752 24.252 23.752 26.771 26.211
-64(1.854) -56(2.184) -48(2.515) -40(2.845) -40(3.175) -32(3.505) -32(4.166) -24(4.826) -24(5.486)
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
规 格 (UNF)
1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2
-28 -24 -24 -20 -20 -18 -16 -14 -12 -12 -12 -12 -12
美 制 细 螺 纹 2级牙钻孔径 标 准 径 最 大 最 小 1.25 1.305 1.182 1.55 1.612 1.474 1.85 1.912 1.756 2.10 2.197 2.025 2.40 2.458 2.271 2.70 2.740 2.551 2.90 3.022 2.820 3.50 3.606 3.404 4.10 4.165 3.963 4.60 4.724 4.496 5.50 5.588 5.360 6.90 7.035 6.782 8.50 8.636 8.382 9.90 10.033 9.729 11.50 11.607 11.329 14.50 14.681 14.351 17.50 17.678 17.323 20.50 20.675 20.270 23.20 23.571 23.114 26.50 26.746 26.289 29.50 29.921 29.464 32.80 33.096 32.639 36.0 36.271 35.814
规 格 (UNEF)
2级牙钻孔径 最 大 最 小 11.153 10.917 11.52 11.400 12.676 12.376 13.153 12.917 13.676 13.376 14.153 13.917 14.676 14.376 15.153 14.917 15.676 15.376 16.153 15.917 16.210 15.835 16.676 16.376 17.153 16.917 18.210 17.835 18.676 18.376 19.153 18.917 20.210 19.835 20.676 20.376 21.153 20.917 22.210 21.835 22.676 22.376 23.153 22.917 23.210 22.835 23.676 23.376 24.153 23.917 24.676 24.376 25.210 24.835 25.676 25.376 26.153 25.917 26.210 25.835 26.676 26.376 27.153 26.917 27.252 26.752 28.210 27.835 28.676 28.376 29.153 28.917 30.210 29.835