螺纹攻牙底孔孔径对照表

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 6×1 5 5.13 (80%) 4.917 5.153 7×1 6 6.13 (80%) 5.917 6.153 8×1.25 6.8 6.85 (85%) 6.647 6.912 9×1.25 7.8 7.85 (85%) 7.647 7.912 10×1.5 8.5 8.62 (85%) 8.376 8.676 11×1.5 9.5 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 2.721 3.5 ×0.35 3.2 3.22 (75%) 3.121 3.221 4×0.5 3.5 3.59 (75%) 3.459 3.599 4.5 ×0.5 4 4.09 (75%) 3.959 4.099 5×0.5 4.5 4.59 (75%) 4.459 4.599 5.5 ×0.5 5 5.09 (75%) 4.959 5.099 6×0.75 5.3 5.35 (80%) 5.188 5.378 7×0.75 6.3 6.35 (80%) 6.188 6.378 8×1 7 7.13 (80%) 6.917 7.153 8×0.75 7.3 7.35 (80%) 7.188 7.378 9×1 8 8.13 (80%) 7.917 8.153 9×0.75 8.3 8.35 (80%) 8.188 8.378 10× 1.25 8.8 8.85 (85%) 8.647 8.912 10× 1 9 9.13 (80%) 8.917 9.153 10× 0.75 9.3 9.35 (80%) 9.188 9.378 11 ×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 11.153 14 ×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 16.210 18 ×1.5 16.5 16.62 (85%) 16.376 16.676 18 ×1 17 17.13 (80%) 16.917 17.153 20 ×2 18 18.2 (85%) 17.835 18.210 20 ×1.5 18.5 18.62 (85%) 18.376 18.676 20 ×1 19 19.13 (80%) 18.917 19.153 22 ×2 20 20.2 (85%) 19.835 20.210 22 ×1.5 20.5 20.62 (85%) 20.376 20.676 22 ×1 21 21.13 (80%) 20.917 21.153 24 ×2 22 22.2 (85%) 21.835 22.210 24 ×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 23.210 25 ×1.5 23.5 23.62 (85%) 23.376 23.676 25 ×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 ×1.5 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 48.21050 ×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)內螺紋小徑螺纹尺寸钻头直径2B级螺纹下孔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 3.53010 -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%) 13.386 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 22.60611/8 -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)內螺紋小徑螺纹尺寸 钻头直径 2B级螺纹下孔徑最小直径 最大直径NO. 0-80UNF 1.25 1.30 (65%) 1.182 1.305 1 -72 1.55 1.61 (65%) 1.474 1.612 2 -64 1.85 1.90 (65%) 1.756 1.912 3 -56 2.1 2.17 (70%) 2.025 2.197 4 -48 2.4 2.44 (70%) 2.271 2.458 5 -44 2.7 2.74 (70%) 2.551 2.740 6 -40 2.9 3.02 (70%) 2.820 3.022 8 -36 3.5 3.59 (75%) 3.404 3.606 10 -32 4.1 4.14 (80%) 3.963 4.165 12 -284.6 4.70 (80%) 4.496 4.724 1/4 -285.5 5.56 (80%) 5.360 5.588 5/16 -246.97.02 (80%) 6.782 7.035 3/8 -248.5 8.61 (80%) 8.382 8.636 7/16 -209.9 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 -1420.5 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 -123636.2 (85%)35.814 36.2715、英制粗牙螺紋 (單位：mm) 下 孔 徑嵌 合 率螺紋尺寸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 3/439.2 39.0 80.783.8 74.888.31 7/8 41.8 41.5 80.6 84.7 74.7 88.4 245.0 44.7 80.2 84.4 74.7 88.46、英制管用螺紋 (單位：mm)錐管內螺紋Rc(PT) 平行內螺紋Rp(PS) 錐管內螺紋 管用螺紋尺寸計 算 值 下 孔 徑 計 算 值 下 孔 徑 計 算 值下 孔 徑 1/166.230 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 38 1 1/2 43.833 44 44.565 45 43.720 43 2 55.412 55 56.476 56 55.406 55 2 1/2 70.701 71 72.009 72 70.788 70 3 83.201 83 84.709 85 83.364 83 3 1/2 95.547 96 97.155 97 95.747 95 4 107.834 108 109.855 110 108.322 108 5 133.110 133 135.255 135 133.597 133 6 158.510 159 160.655 161 158.810 158 7 183.360 183 185.954 186 8 208.560 209 211.354 212 9 233.960 234 236.754 237 10 259.166 259 262.154 262 12309.747310312.8753137、美制管用耐密斜行螺紋(NPTF ‧NPSF) (單位：mm)鑽頭直徑 管用螺紋尺寸使用鉸刀場合鑽頭直徑不使用鉸刀場合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) 3/457/640.891 (22.63) 59/64 0.922 (23.42) －0.922 (23.42) 11 1/81.125 (28.58) 1 5/321.156 (29.36) 1 5/32 1.156 (29.36)1 1/4 1 15/32 1.469 (37.31) 1 1/21.500 (38.10) － － 1 1/21 45/641.703 (43.26)1 47/641.734 (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)1級螺紋用下孔徑2級螺紋用下孔徑螺紋尺寸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 10 17.22 ~17.31(100~90) (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)2B級螺紋用下孔徑3B級螺紋用下孔徑螺紋尺寸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)2B級螺紋用下孔徑3B級螺紋用下孔徑螺紋尺寸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)1級螺紋用下孔徑2級螺紋用下孔徑螺紋尺寸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 － 1.858~1.887 (100~80)(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)鑽 頭 直 徑下孔徑螺紋尺寸最小直徑最大直徑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 12.5 14 ×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)鑽 頭 直 徑下孔徑螺紋尺寸最小直徑最大直徑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)下孔徑螺紋尺寸鑽 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)鑽 頭 直 徑下孔徑螺紋尺寸最小直徑最大直徑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 14.75/8 –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1/167.723277.777.142 1/8289.7289.1472710.1169.489 1/41913.15712.3011813.42712.487 3/81916.66215.8061816.86615.926 1/21420.95519.7931420.98019.772 3/41426.44125.2791426.32625.117 11133.24931.770111/233.93231.461 11/41141.91040.431111/241.68940.218 11/21147.80346.324111/247.68946.287 21159.61458.135111/259.79658.325 21/21175.18473.705872.27370.159 31187.88486.405888.18286.068 31/211100.33098.8518100.69198.776 411113.030111.5518113.548111.433 41/211125.730124.251511138.430136.9518141.3138.412 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 4.826山數節距換算表山數(每25.4mm) 節距mm100 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)
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)
單位：mm)
(2)基於JIS B 0211-1982標準
3、美制粗牙螺紋 (單位：mm)
4、美制細牙螺紋 (單位：mm)
5、英制粗牙螺紋 (單位：mm)
6、英制管用螺紋 (單位：mm)
7、美制管用耐密斜行螺紋(NPTF‧NPSF) (單位：mm)
8、公制螺紋(NRT) (單位：mm)
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)
3、公制螺紋(HRT) (單位：mm)
4、公制粗牙螺紋 HL-NRT (單位：mm)
三、螺紋下孔徑表(護套螺紋用)
1、公制粗牙螺紋 (單位：mm)
2、公制細牙螺紋 (單位：mm)
3、美制粗牙螺紋 (單位：mm)
mm)
各種換算表
美制螺絲外徑公厘(mm)換算表
山數節距換算表。

60%100%60%100%60%100%60%100%60%100% M1 ×0.250.750.840.73M1 ×0.20.800.870.78W1/16-60 1.20 1.26 1.05Nr.1-64 1.50 1.60 1.42Nr.0-80 1.30 1.32 1.18 M1.1　×0.250.850.940.83M1.1　×0.20.900.970.88W3/32-48 1.80 1.97 1.70Nr.2-56 1.80 1.89 1.69Nr.1-72 1.60 1.62 1.47 M1.2　×0.250.95 1.040.93M1.2　×0.2 1.00 1.070.98W1/8-40 2.60 2.69 2.36Nr.3-48 2.10 2.17 1.94Nr.2-64 1.90 1.93 1.75 M1.4×0.3 1.10 1.21 1.08M1.4　×0.2 1.20 1.27 1.18W5/32-32 3.10 3.36 2.95Nr.4-40 2.30 2.43 2.16Nr.3-56 2.10 2.22 2.02 M1.6　×0.35 1.25 1.37 1.22M1.6　×0.2 1.40 1.47 1.38W3/16-24 3.60 3.95 3.41Nr.5-40 2.60 2.76 2.49Nr.4-48 2.40 2.50 2.27 M1.7　×0.35 1.35 1.47 1.32M1.8　×0.2 1.60 1.67 1.58W7/32-24 4.50 4.74 4.20Nr.6-32 2.75 2.99 2.65Nr.5-44 2.70 2.80 2.55 M1.8　×0.35 1.45 1.57 1.42M2 ×0.25 1.75 1.84 1.73W1/4-20 5.10 5.37 4.72Nr.8-32 3.50 3.65 3.31Nr.6-40 3.00 3.09 2.82 M2　×0.4 1.60 1.74 1.57M2.2　×0.25 1.95 2.07 1.93W5/16-18 6.50 6.85 6.13Nr.10-24 3.80 4.14 3.68Nr.8-36 3.50 3.71 3.40 M2.2　×0.45 1.75 1.91 1.71M2.5　×0.35 2.15 2.27 2.12W3/8-167.908.317.49Nr.12-24 4.50 4.80 4.34Nr.10-32 4.10 4.31 3.97 M2.3　×0.4 1.90 2.04 1.87M3 ×0.35 2.65 2.77 2.62W7/16-149.309.728.791/4-20 5.10 5.53 4.98Nr.12-28 4.70 4.90 4.50 M2.5　×0.45 2.05 2.21 2.01M3.5　×0.35 3.15 3.27 3.12W1/2-1210.5011.079.995/16-18 6.507.02 6.411/4-28 5.50 5.76 5.37 M2.6　×0.45 2.15 2.31 2.11M4 ×0.5 3.50 3.68 3.46W9/16-1212.0012.6611.583/8-167.908.497.815/16-24 6.907.25 6.79 M3 ×0.5 2.50 2.68 2.46M4.5　×0.5 4.00 4.18 3.96W5/8-1113.5014.1012.927/16-149.309.939.153/8-248.508.848.38 M3 ×0.6 2.40 2.61 2.35M5 ×0.5 4.50 4.68 4.46W3/4-1016.5017.1015.801/2-1310.8011.4310.587/16-209.9010.299.74 M3.5　×0.6 2.90 3.11 2.85M5.5　×0.5 5.00 5.18 4.96W7/8-919.2520.0618.619/16-1212.2012.9112.001/2-2011.5011.8811.33 M4 ×0.7 3.30 3.55 3.24M6 ×0.5 5.50 5.68 5.46W1-822.0022.9621.335/8-1113.5014.3813.389/16-1812.9013.3712.76 M4 ×0.75 3.25 3.51 3.19M6 ×0.75 5.25 5.51 5.19W11/8-724.7525.7923.933/4-1016.5017.4016.305/8-1814.5014.9614.35 M4.5　×0.75 3.75 4.01 3.69M7 ×0.75 6.25 6.51 6.19W11/4-727.7528.9627.107/8-919.5020.3919.173/4-1617.5018.0217.33 M5 ×0.8 4.20 4.48 4.13M8 ×0.757.257.517.19W13/8-630.2031.6729.501-822.2523.3421.967/8-1420.2521.0520.26 M5 ×0.9 4.10 4.70 4.66M8 ×1.07.007.35 6.92W11/2-633.5034.8532.6811/4-728.0029.3927.821-1223.2524.0323.11 M6 ×1.0 5.00 5.35 4.92M9 ×1.08.008.357.92W15/8-535.5037.3734.7713/8-631.0032.1830.3411/8-1226.5027.2026.28 M7 ×1.0 6.00 6.35 5.92M10　×0.759.259.519.19W13/4-538.5040.5537.9411/2-634.5035.3533.5211/4-1229.5030.3829.46 M8 ×1.25 6.807.19 6.65M10　×1.09.009.358.92W17/8-4.541.5043.2940.4013/4-539.0041.1538.9513/8-1232.5033.3532.63 M9　×1.257.808.197.65M10　×1.258.759.198.65W2-4.544.5046.4643.572-4.545.0047.1344.6911/2-1236.0036.7335.81 M10 ×1.58.509.038.38M11　×1.010.0010.359.92M11 ×1.59.5010.039.38M12　×0.7511.2511.5111.19M12 ×1.7510.2010.8610.11M12　×1.011.0011.3510.92M14 ×2.012.0012.7011.83M12　×1.2510.7511.1910.65M16　×2.014.0014.7013.83M12　×1.510.5011.0310.38M18 ×2.515.5016.3815.29M14　×1.013.0013.3512.9260%100%60%100%60%100% M20 ×2.517.5018.3817.29M14　×1.2512.7513.1912.65W1/16-60 1.40 1.42 1.32Nr.1-64 1.70 1.73 1.64Nr.0-80 1.40 1.42 1.35 M22 ×2.519.5020.3819.29M14　×1.512.5013.0312.38W3/32-48 2.10 2.18 2.04Nr.2-56 2.00 2.04 1.94Nr.1-72 1.70 1.74 1.66 M24 ×3.021.0022.0520.75M15　×1.014.0014.3513.92W1/8-40 2.85 2.93 2.77Nr.3-48 2.25 2.34 2.23Nr.2-64 2.00 2.06 1.97 M27 ×3.024.0025.0523.75M15　×1.2513.7514.1913.65W5/32-32 3.55 3.66 3.46Nr.4-40 2.55 2.64 2.50Nr.3-56 2.30 2.37 2.27 M30　×3.526.5027.7326.21M15　×1.513.5014.0313.38W3/16-24 4.25 4.36 4.08Nr.5-40 2.90 2.97 2.83Nr.4-48 2.60 2.67 2.56 M33　×3.529.5030.7329.21M16　×1.015.0015.3514.92W7/32-24 5.05 5.15 4.88Nr.6-32 3.15 3.25 3.08Nr.5-44 2.90 2.99 2.86 M36 ×4.032.0033.4031.67M16　×1.2514.7515.1914.65W1/4-20 5.75 5.86 5.54Nr.8-32 3.80 3.91 3.74Nr.6-40 3.20 3.30 3.16 M39 ×4.035.0036.4034.67M16　×1.514.5015.0314.38W5/16-187.307.407.03Nr.10-24 4.35 4.48 4.25Nr.8-36 3.85 3.94 3.78 M42 ×4.537.5039.0837.13M18　×1.017.0017.3516.92W3/8-168.808.928.51Nr.12-24 5.00 5.14 4.91Nr.10-32 4.45 4.57 4.40 M45　×4.540.5042.0840.13M18　×1.2516.7517.1916.65W7/16-1410.3010.429.951/4-20 5.75 5.94 5.66Nr.12-28 5.05 5.19 4.99 M48 ×5.043.0044.7542.59M18　×1.516.5017.0316.38W1/2-1211.7511.8911.345/16-187.307.487.171/4-28 5.95 6.06 5.86 M52 ×5.047.0048.7546×59M18　×2.016.0016.7015.833/8-168.809.018.675/16-247.407.597.36 M56 ×5.550.5052.4350.05M20　×1.019.0019.3518.927/16-1410.3010.5210.133/8-249.009.188.95 M60 ×5.554.5056.4354.05M20　×1.2518.7519.1918.651/2-1311.8012.0711.641/2-2012.1012.2912.01 M64 ×658.0060.1057.50M20　×1.518.5019.0318.38M68 ×662.0064.1061.50M20　×2.018.0018.7017.83PT(Rc)PS(Pp)PF(G)M72　×666.0068.1065.50M22　×1.021.0021.3520.92下孔径下孔径下孔径M76 ×670.0072.1069.50M22　×1.2520.7521.1920.651/16-28 6.30 6.50 6.70英时英时//公 对照表无屑丝攻美制细牙螺纹无屑丝攻美制细牙螺纹((UNFUNF))规格规格规格规格公制粗牙螺纹公制粗牙螺纹((M)下孔径(%)下孔径规格公制细牙螺纹公制细牙螺纹((M)下孔径下孔径(%)无屑丝攻英制粗牙螺纹无屑丝攻英制粗牙螺纹((W)规格规格英制管牙螺纹无屑丝攻美制粗牙螺纹无屑丝攻美制粗牙螺纹((UNCUNC))针车牙螺纹针车牙螺纹((SMSM))英制粗牙螺纹英制粗牙螺纹((W)下孔径下孔径(%)规格美制细牙螺纹美制细牙螺纹((UNFUNF))下孔径下孔径(%)规格螺丝攻下孔径对照表下孔径下孔径(%)下孔径下孔径(%)下孔径下孔径(%)美制粗牙螺纹美制粗牙螺纹((UNCUNC))下孔径下孔径(%)M22　×1.520.5021.0320.381/8-288.308.608.70M22　×2.020.0020.0719.831/4-1911.0011.5011.7060%100%M24　×1.023.0023.3522.923/8-1914.5015.0015.25SM1/16-80 1.30 1.34 1.181/16M24　×1.2522.7523.1922.651/2-1418.1018.5019.00SM5/64-64 1.60 1.68 1.473/32M24　×1.522.5023.0322.385/8-1421.00SM3/32-100 2.15 2.18 2.051/860%100%M24　×2.022.0022.7021.833/4-1423.5024.0024.50SM3/32-56 1.90 2.03 1.795/32M1×0.250.900.920.86M25　×1.024.0024.1923.927/8-1428.00SM1/8-44 2.55 2.73 2.4311/64M1.1×0.25 1.00 1.020.96M25　×1.523.5024.0323.381-1129.6030.2530.50SM1/8-40 2.50 2.68 2.353/16M1.2×0.25 1.10 1.12 1.06M25　×2.023.0023.7022.8311/8-1135.50SM9/64-40 2.90 3.08 2.757.32M1.4×0.3 1.25 1.30 1.24M26　×1.524.5025.0324.3811/4-1138.1039.0039.50SM11/64-40 3.70 3.87 3.5415/64M1.6×0.35 1.45 1.49 1.41M27　×1.026.0026.3525.9211/2-1144.0044.9045.00SM3/16-32 3.95 4.14 3.731/4M1.7×0.35 1.55 1.59 1.51M27　×1.525.5026.0325.3813/4-1151.00SM3/16-28 3.80 4.06 3.589/32M1.8×0.35 1.65 1.69 1.61M27　×2.025.0025.7024.832-1155.6056.6057.00SM7/32-32 4.70 4.94 4.535/16M2×0.4 1.80 1.87 1.78M28　×1.526.5027.0326.38SM15/64-28 5.00 5.25 4.773/8M2.2×0.45 2.00 2.05 1.96M28　×2026.0026.7025.83SM1/4-40 5.70 5.86 5.537/16M2.3×0.4 2.10 2.17 2.08M30　×1.029.0029.3528.92SM1/4-28 5.40 5.64 5.171/2M2.5×0.45 2.30 2.35 2.26M30　×1.528.5029.0328.38SM1/4-24 5.25 5.53 4.989/16M2.6×0.45 2.40 2.45 2.36M30　×2.028.0028.7027.83NPT SM9/32-28 6.20 6.44 5.975/8M3×0.5 2.75 2.84 2.73M32　×1.530.5031.0330.38下孔径SM9/32-20 5.80 6.15 5.4911/16M3.5×0.6 3.20 3.31 3.18M33　×1.531.5032.0331.381/16-27 6.20SM5/16-287.007.23 6.673/4M4×0.7 3.65 3.77 3.62M33　×2.031.0031.7030.831/8-278.50SM5/16-24 6.857.11 6.567/8M4.5×0.75 4.15 4.26 4.09M33　×3.030.0031.5029.751/4-1811.00SM5/16-18 6.50 6.84 6.101M5×0.8 4.60 4.74 4.57M35　×1.533.5034.0333.383/8-1814.50SM3/8-288.558.828.3511/8M6×1.0 5.50 5.68 5.46M36　×1.534.5035.0334.381/2-1418.00SM3/8-188.058.437.6911/4M7×1.0 6.50 6.68 6.46M36　×2.034.0034.7033.833/4-1423.00SM7/16-2810.1510.419.9313/8M8×1.257.357.597.32M36　×3.033.0034.0532.751-111/２29.00SM7/16-169.409.889.0511/2M9×1.258.408.598.32M38　×1.536.5037.0336.3811/4-111/２38.00SM1/2-2811.7511.9911.5215/8M10×1.59.259.519.19M39　×1.537.5038.0337.3811/2-111/２44.00SM1/2-2011.3511.7111.0513/4M12×1.7511.1011.4311.05M39　×2.037.0037.7036.832-111/３56.00SM1/2-1210.4011.059.9517/8M39　×3.036.0037.0535.7521/265.892M40　×1.538.5039.0338.38M40　×2.038.0038.7037.83M40　×3.037.0038.0536.75M42　×1.540.5041.0340.3860%100%M42　×2.040.0040.7039.83Pg7 -2011.4011.6911.08M42　×3.039.0040.0538.75Pg9 -1814.0014.3313.66M42　×4.038.0040.7037.66Pg11 -1817.2517.7317.06M45　×1.543.5044.0343.38Pg13.5　-1819.0019.5318.86M45　×2.043.0043.7042.83Pg16 -1821.2521.6320.96M45　×3.042.0043.0541.75Pg21 -1626×7527.2426.48M45　×4.041.0042.4040.67Pg29 -1635.5035.9435.18M48　×2.046.0046.7045.83Pg36 -1645.5045.9445.18M48　×3.045.0046.0544.75Pg42 -1652.5052.9452.08M48　×4.044.0045.4043.67Pg48 -1657.5058.2457.48M50　×1.548.5049.0348.38M50　×2.048.0048.7047.83M50　×3.047.0048.0546.75M52　×1.550.5051.0350.38M52　×2.050.0050.7049.83M52　×3.049.0050.0548.7567.4622.225025.400028.575050.800047.625041.275044.450038.100034.925031.750014.287515.875017.462519.0500美制管牙螺纹无屑丝攻公制粗牙螺纹无屑丝攻公制粗牙螺纹((M )Pg Pg钢管牙钢管牙规格规格规格下孔径下孔径(%)56.4044.45下孔径下孔径(%)规格下孔径下孔径(%)12.70004.36563.96883.17501.587538.1029.4023.4018.1514.7011.158.756.35下孔径NPS 11.112512.70009.52507.93757.14386.35005.95315.55635厘7厘半1分1分2厘半--1分半1分7厘半2.3813--2分2分2厘半2分半3分3分半4分4分半5分5分半6分7分1吋1吋1分1吋2分1吋3分2吋1吋4分1吋5分1吋6分1吋7分。