常用螺紋尺寸及公差匯總表
公制螺紋
| 螺紋代號 | 基本直徑 | 內螺紋公差等級 | 外螺紋公差 | ||||||
大徑 | 中徑 | 小徑 | 6H | 7H | 6G | ||||
中徑公差 | 小徑公差 | 中徑公0,差 | 小徑公差 | 中徑公差 | 小徑公差 | ||||
M10*1 | 10 | 9.35 | 8.917 | 0,+0.150 | 0,+0.236 | 0,+0.190 | 0,+0.300 | -0.026,-0.138 | -0.026,0.206 |
M12*1 | 12 | 11.35 | 10.917 | 0,+0.160 | 0,+0.236 | 0,+0.200 | 0,+0.300 | -0.026,-0.144 | -0.026,0.206 |
M14*1 | 14 | 13.35 | 122.917 | 0,+0.160 | 0,+0.236 | 0,+0.200 | 0,+0.300 | -0.026,-0.144 | -0.026,0.206 |
M12*1.25 | 12 | 11.188 | 10.647 | 0,+0.180 | 0,+0.265 | 0,+0.224 | 0,+0.335 | -0.028,-0.160 | -0.028,-0.240 |
M14*1.25 | 14 | 13.188 | 12.647 | 0,+0.180 | 0,+0.265 | 0,+0.224 | 0,+0.335 | -0.028,-0.160 | -0.028,-0.240 |
M12*1.5 | 12 | 11.026 | 10.376 | 0,+0.190 | 0,+0.300 | 0,+0.236 | 0,+0.375 | -0.032,-0.172 | -0.032,-0.268 |
M14*1.5 | 14 | 13.026 | 12.376 | 0,+0.190 | 0,+0.300 | 0,+0.236 | 0,+0.375 | -0.032,-0.172 | -0.032,-0.268 |
M16*1.5 | 16 | 15.026 | 14.376 | 0,+0.190 | 0,+0.300 | 0,+0.236 | 0,+0.375 | -0.032,-0.172 | -0.032,-0.268 |
M18*1.5 | 18 | 17.026 | 16.376 | 0,+0.190 | 0,+0.300 | 0,+0.236 | 0,+0.375 | -0.032,-0.172 | -0.032,-0.268 |
M20*1.5 | 20 | 19.026 | 18.376 | 0,+0.190 | 0,+0.300 | 0,+0.236 | 0,+0.375 | -0.032,-0.172 | -0.032,-0.268 |
M22*1.5 | 22 | 21.026 | 20.376 | 0,+0.190 | 0,+0.300 | 0,+0.236 | 0,+0.375 | -0.032,-0.172 | -0.032,-0.268 |
M24*1.5 | 14 | 23.026 | 22.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M26*1.5 | 26 | 25.026 | 24.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M27*1.5 | 27 | 26.026 | 25.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M30*1.5 | 30 | 29.026 | 28.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M33*1.5 | 33 | 32.026 | 31.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M36&1.5 | 36 | 35.026 | 34.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M39*1.5 | 39 | 38.026 | 37.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M42*1.5 | 42 | 41.026 | 40.376 | 0,+0.200 | 0,+0.300 | 0,+0.250 | 0,+0.375 | -0.032,-0.182 | -0.032,-0.268 |
M27*2 | 27 | 25.701 | 24.835 | 0,+0.224 | 0,+0.375 | 0,+0.280 | 0,+0.475 | -0.038,-0.208 | -0.038,-0.318 |
M30*2 | 30 | 28.701 | 27.835 | 0,+0.224 | 0,+0.375 | 0,+0.280 | 0,+0.475 | -0.038,-0.208 | -0.038,-0.318 |
M33*2 | 33 | 31.701 | 30.835 | 0,+0.224 | 0,+0.375 | 0,+0.280 | 0,+0.475 | -0.038,-0.208 | -0.038,-0.318 |
M36*2 | 36 | 34.701 | 33.835 | 0,+0.224 | 0,+0.375 | 0,+0.280 | 0,+0.475 | -0.038,-0.208 | -0.038,-0.318 |
M39*2 | 39 | 37.701 | 36.835 | 0,+0.224 | 0,+0.375 | 0,+0.280 | 0,+0.475 | -0.038,-0.208 | -0.038,-0.318 |
M42*2 | 42 | 40.701 | 39.835 | 0,+0.224 | 0,+0.375 | 0,+0.280 | 0,+0.475 | -0.038,-0.208 | -0.038,-0.318 |
M45*2 | 45 | 43.701 | 42.835 | 0,+0.224 | 0,+0.375 | 0,+0.280 | 0,+0.475 | -0.038,-0.208 | -0.038,-0.318 |
M52*2 | 52 | 50.701 | 49.835 | 0,+0.236 | 0,+0.375 | 0,+0.300 | 0,+0.475 | -0.038,-0.218 | -0.038,-0.318 |
M60*2 | 60 | 58.701 | 57.835 | 0,+0.236 | 0,+0.375 | 0,+0.300 | 0,+0.475 | -0.038,-0.218 | -0.038,-0.318 |
M64*2 | 64 | 62.701 | 61.835 | 0,+0.236 | 0,+0.375 | 0,+0.300 | 0,+0.475 | -0.038,-0.218 | -0.038,-0.318 |
M72*2 | 72 | 70.701 | 69.835 | 0,+0.236 | 0,+0.375 | 0,+0.300 | 0,+0.475 | -0.038,-0.218 | -0.038,-0.318 |
美制NPSM螺紋（美國標準ANSI B1.20.1機械連接用直管螺紋60度）
標號 | 螺紋代號 | 外螺紋（2A級） | 內螺紋（2B級） | ||||||
大徑 | 中徑 | 小徑 | 中徑 | ||||||
最大值 | 最小值 | 最大值 | 最小值 | 最小值 | 最大值 | 最小值 | 最大值 | ||
02 | 1/8-27NPSM | 10.084 | 9.906 | 9.462 | 9.370 | 9.093 | 9.246 | 9.489 | 9.609 |
04 | 1/4-18NPSM | 13.360 | 13.132 | 12.454 | 12.342 | 11.887 | 12.217 | 12.487 | 12.634 |
06 | 3/8-18NPSM | 16.815 | 16.586 | 15.890 | 15.776 | 15.316 | 15.545 | 15.926 | 16.076 |
08 | 1/2-14NPSM | 20.904 | 20.650 | 19.733 | 19.604 | 18.974 | 19.279 | 19.771 | 19.942 |
12 | 3/4-14NPSM | 26.264 | 26.010 | 25.077 | 24.943 | 24.333 | 24.638 | 25.118 | 25.293 |
16 | 1-11.5NPSM | 32.842 | 32.537 | 31.417 | 31.270 | 30.505 | 30.759 | 31.460 | 31.653 |
20 | 1.1/4-11.5NPSM | 41.605 | 41.300 | 40.173 | 40.020 | 39.268 | 39.497 | 40.218 | 40.416 |
24 | 1.1/2-11.5NPSM | 47.676 | 47.371 | 46.241 | 46.086 | 45.339 | 45.568 | 46.286 | 46.487 |
32 | 2-11.5NPSM | 59.715 | 59.411 | 58.278 | 58.120 | 57.379 | 57.607 | 58.326 | 58.532 |
40 | 2.1/2-8NPSM | 72.161 | 71.780 | 70.104 | 69.916 | 68.783 | 69.266 | 70.160 | 70.409 |
48 | 3-8NPSM | 88.062 | 87.681 | 86.009 | 85.816 | 84.684 | 85.166 | 86.068 | 86.319 |
NPT布錐管螺紋
標號 | 螺紋代號 | 基面上的直徑 | 螺紋長(cháng)度 | 端面大徑 | |||
大徑 | 中徑 | 小徑 | 管端至基面長(cháng) | 有效長(cháng)度 | |||
02 | Z1/8*27 | 10.242 | 9.489 | 8.736 | 4.102 | 6.703 | 9.986 |
04 | Z1/4*18 | 13.616 | 12.487 | 11.385 | 5.786 | 10.206 | 13.254 |
06 | Z3/8*18 | 17.055 | 15.926 | 14.797 | 6.096 | 10.358 | 16.674 |
08 | Z1/2*14 | 21.223 | 19.772 | 18.321 | 8.128 | 13.556 | 20.715 |
12 | Z3/4*14 | 26.568 | 25.117 | 23.666 | 8.611 | 13.861 | 26.030 |
16 | Z1*11.5 | 33.228 | 31.461 | 29.694 | 10.160 | 17.343 | 32.593 |
20 | Z1.1/4*1.5 | 41.985 | 40.218 | 38.451 | 10.668 | 17.953 | 41.318 |
24 | Z1.1/2*11.5 | 48.054 | 46.287 | 44.520 | 10.668 | 18.377 | 47.387 |
32 | Z2*11.5 | 60.092 | 58.325 | 56.558 | 11.074 | 19.215 | 59.400 |
40 | Z2.1/2*8 | 72.699 | 70.159 | 67.619 | 17.323 | 28.892 | 71.616 |
48 | Z3*8 | 88.608 | 86.068 | 83.528 | 19.456 | 30.480 | 87.392 |
55度英錐管螺紋
標號 | 螺紋代號 | 基本直徑 | 內螺紋 | 外螺紋 | ||||||
大徑 | 中徑 | 小徑 | 中徑公差 | 小徑公差 | 公差等級 | |||||
A | B | |||||||||
中徑公差 | 大徑公差 | 中徑公差 | 大徑公差 | |||||||
02 | G1/8*28 | 9.728 | 9.147 | 8.566 | 0.170，0 | 0.282，0 | 0，-0.170 | 0，-0.214 | 0，-0.214 | 0，-0.214 |
04 | G1/4*19 | 13.157 | 12.301 | 11.445 | 0.125，0 | 0.445，0 | 0.-0.125 | 0，-0.250 | 0，-0.250 | 0，-0.250 |
06 | G3/8*19 | 16.662 | 15.806 | 14.950 | 0.125，0 | 0.445，0 | 0，-0.125 | 0，-0.250 | 0，-0.250 | 0，-0.250 |
08 | G1/2*14 | 20.955 | 19.793 | 18.631 | 0.142，0 | 0.541，0 | 0，-0.142 | 0，-0.284 | 0，-0.284 | 0，-0.284 |
10 | G5/8*14 | 22.911 | 21.749 | 20.587 | 0.142，0 | 0.541，0 | 0，-0.142 | 0，-0.284 | 0，-0.284 | 0，-0.284 |
12 | G3/4*14 | 26.441 | 25.279 | 24.117 | 0.142，0 | 0.541，0 | 0，-0.142 | 0，-0.284 | 0，-0.284 | 0，-0.284 |
16 | G1*11 | 33.249 | 31.770 | 30.291 | 0.180，0 | 0.640，0 | 0，-0.180 | 0，-0.360 | 0，-0.360 | 0，-0.360 |
20 | G1.1/4*11 | 41.910 | 40.431 | 38.952 | 0.180，0 | 0.640，0 | 0，-0.180 | 0，-0.360 | 0，-0.360 | 0，-0.360 |
24 | G1.1/2*11 | 47.803 | 46.324 | 44.845 | 0.180，0 | 0.640，0 | 0，-0.180 | 0，-0.360 | 0，-0.360 | 0，-0.360 |
32 | G2*11 | 59.614 | 58.135 | 56.656 | 0.180，0 | 0.640，0 | 0，-0.180 | 0，-0.360 | 0，-0.360 | 0，-0.360 |
40 | G2.1/2*11 | 75.184 | 73.705 | 72.226 | 0.217，0 | 0.640，0 | 0，-0.217 | 0，-0.434 | 0，-0.434 | 0，-0.434 |
48 | G3*11 | 87.884 | 86.405 | 84.926 | 0.217，0 | 0.640，0 | 0，-0.217 | 0，-0.434 | 0，-0.434 | 0，-0.434 |
55度英錐管螺紋
標號 | 螺紋代號 | 基面上的直徑 | 基準長(cháng)度 | 有效螺紋長(cháng)度 | 圓錐內螺紋基面軸向位移的極限偏差 | 端面大徑 | ||||||
大徑 | 中徑 | 小徑 | 基本 | 最大 | 最小 | 基本 | 最大 | 最小 | ||||
02 | R1/8*28 | 9.728 | 9.147 | 8.566 | 4 | 4.9 | 3.1 | 6.5 | 7.4 | 5.6 | 1.1 | 9.478 |
04 | R1/4*19 | 13.157 | 12.301 | 11.445 | 6 | 7.3 | 4.7 | 9.7 | 11 | 8.4 | 1.7 | 12.782 |
06 | R3/8*19 | 16.662 | 15.806 | 14.950 | 6.4 | 7.7 | 5.1 | 10.1 | 11.4 | 8.8 | 1.7 | 16.262 |
08 | R1/2*14 | 20.955 | 19.793 | 18.631 | 8.2 | 10 | 6.4 | 13.2 | 15 | 11.4 | 2.3 | 20.443 |
12 | R3/4*14 | 26.441 | 25.279 | 24.117 | 9.5 | 11.3 | 7.7 | 14.5 | 16.3 | 12.7 | 2.3 | 25.847 |
16 | R1*11 | 33.249 | 31.770 | 30.291 | 10.4 | 12.7 | 8.1 | 16.8 | 19.1 | 14.5 | 2.9 | 32.599 |
20 | R1.1/4*11 | 41.910 | 40.431 | 38.952 | 12.7 | 15 | 10.4 | 19.1 | 21.4 | 16.8 | 2.9 | 41.116 |
24 | R1.1/2*11 | 47.803 | 46.324 | 44.845 | 12.7 | 15 | 10.4 | 19.1 | 21.4 | 16.8 | 2.9 | 47.009 |
32 | R2*11 | 59.614 | 58.135 | 56.656 | 15.9 | 18.2 | 13.6 | 23.4 | 25.7 | 21.1 | 2.9 | 58.620 |
40 | R2.1/2*11 | 75.184 | 73.705 | 72.226 | 17.5 | 21 | 14 | 26.7 | 30.2 | 23.2 | 3.5 | 74.090 |
48 | R3*11 | 87.884 | 86.405 | 84.926 | 20.6 | 24.1 | 17.1 | 29.8 | 33.3 | 26.3 | 3.5 | 86.597 |
美制螺紋
標號 | 螺紋代號 | 外螺紋 | 內螺紋 | ||||||||
公差等級2A | 公差等級2B | ||||||||||
大徑 | 中徑 | 小徑 最大 | 小徑 | 中徑 | 大徑 最小 | ||||||
最大 | 最小 | 最大 | 最小 | 最小 | 最大 | 最小 | 最大 | ||||
JIC螺紋 | |||||||||||
02 | 5/16×24UNF | 7.910 | 7.727 | 7.221 | 7.127 | 6.650 | 6.782 | 7.036 | 7.249 | 7.371 | 7.938 |
03 | 3/8*24UNF | 9.497 | 9.314 | 8.809 | 8.712 | 8.237 | 8.382 | 8.636 | 8.837 | 8.961 | 9.525 |
04 | 7/16*20UNF | 11.079 | 10.874 | 10.254 | 10.147 | 9.568 | 9.728 | 10.033 | 10.287 | 10.424 | 11.113 |
05 | 1/2*20UNF | 12.667 | 12.461 | 11.841 | 11.732 | 11.156 | 11.328 | 11.608 | 11.875 | 12.017 | 12.7 |
06 | 9/16*18UNF | 14.252 | 14.031 | 13.335 | 13.221 | 12.573 | 12.751 | 13.081 | 13.371 | 13.52 | 14.288 |
08 | 3/4*16UNF | 19.012 | 18.773 | 17.981 | 17.854 | 17.12 | 17.323 | 17.678 | 18.019 | 18.184 | 19.05 |
10 | 7/8*14UNF | 22.184 | 21.923 | 21.006 | 20.869 | 20.025 | 20.269 | 20.676 | 21.046 | 21.224 | 22.225 |
12 | 1.1/16*12UNF | 26.944 | 26.655 | 25.57 | 25.425 | 24.425 | 24.689 | 25.146 | 25.613 | 25.801 | 26.988 |
16 | 1.5/16*12UNF | 33.294 | 33.005 | 31.92 | 31.773 | 30.775 | 31.039 | 31.496 | 31.963 | 32.154 | 33.338 |
20 | 1.5/8*12UNF | 41.229 | 40.94 | 39.855 | 39.705 | 38.71 | 38.989 | 39.446 | 39.901 | 40.094 | 41.275 |
24 | 1.7/8*12UNF | 47.579 | 47.29 | 46.205 | 46.053 | 45.06 | 45.339 | 45.796 | 46.251 | 46.449 | 47.625 |
32 | 2.1/2*12UNF | 63.452 | 63.162 | 62.078 | 61.92 | 60.932 | 61.214 | 61.671 | 62.126 | 62.332 | 63.5 |
40 | 3812UNF | 76.157 | 75.862 | 74.778 | 74.618 | 73.632 | 73.914 | 74.371 | 74.826 | 75.034 | 76.2 |
18HK | 1.1/2*10UNF | 38.052 | 37.724 | 36.401 | 36.238 | 35.029 | 35.357 | 35.890 | 36.449 | 36.660 | 38.100 |
ORFS螺紋 | |||||||||||
04 | 9/16*18UNF | 14.252 | 14.031 | 13.335 | 13.221 | 12.573 | 12.751 | 13.081 | 13.371 | 13.52 | 14.288 |
06 | 11/16*16UNF | 17.427 | 17.188 | 16.396 | 16.274 | 15.535 | 15.748 | 16.104 | 16.431 | 16.589 | 17.463 |
08 | 13/16*16UNF | 20.599 | 20.361 | 19.568 | 19.444 | 18.707 | 18.923 | 19.279 | 19.606 | 19.766 | 20.638 |
10 | 1*14UNSF | 25.357 | 25.095 | 24.178 | 24.036 | 23.195 | 23.444 | 23.825 | 24.221 | 24.407 | 25.4 |
12 | 1.3/16*12UN | 30.119 | 29.83 | 28.754 | 28.598 | 27.6 | 27.864 | 28.321 | 28.788 | 28.979 | 30.163 |
16 | 1.7/16*12UN | 36.467 | 36.177 | 35.093 | 34.943 | 33.947 | 34.214 | 34.671 | 35.138 | 35.331 | 36.513 |
20 | 1.11/16*12UN | 42.817 | 42.527 | 41.443 | 41.29 | 40.297 | 40.564 | 41.021 | 41.488 | 41.686 | 42.863 |
24 | 2*12UN | 50.754 | 50.465 | 49.38 | 49.25 | 48.235 | 48.514 | 48.971 | 49.426 | 49.627 | 50.8 |
SAE螺紋 | |||||||||||
06 | 5/8×18UNF | 15.839 | 15.618 | 14.923 | 14.803 | 14.161 | 14.351 | 14.681 | 14.958 | 15.11 | 15.875 |
12 | 1.1/16*14UNF | 26.947 | 26.683 | 25.743 | 25.608 | 24.74 | 24.968 | 25.375 | 25.783 | 25.961 | 26.987 |
其他美制螺紋 | |||||||||||
9/16*16UN | 14.252 | 14.013 | 13.221 | 13.101 | 12.36 | 12.573 | 12.929 | 13.256 | 13.411 | 14.288 | |
7/8*12UN | 22.182 | 21.892 | 20.808 | 20.668 | 19.662 | 19.939 | 20.396 | 20.851 | 21.034 | 22.225 | |
2.1/4*12UN | 57.104 | 56.815 | 55.73 | 55.575 | 54.585 | 54.864 | 55.321 | 55.776 | 55.976 | 57.15 | |
可拆式芯子與套筒連接螺紋
軟管編號 | 螺紋代號 | 外螺紋 | 內螺紋 | ||||||||
公差等級2B | |||||||||||
大徑 | 中徑 | 小徑 | 小徑 | 中徑 | 大徑 | ||||||
最大 | 最小 | 最大 | 最小 | 最小 | 最大 | 最小 | 最大 | ||||
R5-04 | 9/32*32 | 7.120 | 6.967 | 6.604 | 6.523 | 6.175 | 6.294 | 6.472 | 6.629 | 6.736 | 7.145 |
R5-05 | 46/127*28 | 9.197 | 9.032 | 8.608 | 8.516 | 8.115 | 8.234 | 8.463 | 8.636 | 8.753 | 9.225 |
R5-06 | 107/254*28 | 10.685 | 10.520 | 10.095 | 10.004 | 9.603 | 9.735 | 9.938 | 10.123 | 10.240 | 10.713 |
R5-08 | 9/16*24 | 14.257 | 14.074 | 13.569 | 13.470 | 12.997 | 13.132 | 13.386 | 13.599 | 13.729 | 14.288 |
R5-10 | 11/16*24 | 17.432 | 17.249 | 16.744 | 16.642 | 16.172 | 16.307 | 16.561 | 16.774 | 16.906 | 17.463 |
R5-12 | 13/16*20 | 20.599 | 20.399 | 19.779 | 19.667 | 19.347 | 19.253 | 19.558 | 19.812 | 19.982 | 20.638 |
R5-16 | 1.1/16*18 | 26.952 | 26.731 | 26.035 | 25.916 | 25.273 | 25.451 | 25.781 | 26.071 | 26.228 | 26.988 |
R5-20 | 1.5/16*18 | 33.299 | 33.078 | 32.382 | 32.258 | 31.620 | 31.801 | 32.131 | 32.421 | 32.581 | 33.338 |
R5-24 | 1.9/16*18 | 39.649 | 39.428 | 38.732 | 38.605 | 37.970 | 38.151 | 38.481 | 38.771 | 38.936 | 39.688 |
R5-32 | 2*18 | 50.762 | 50.541 | 49.845 | 49.715 | 49.083 | 49.276 | 49.606 | 49.883 | 50.053 | 50.800 |
2A-04 | 7/16*20 | 11.079 | 10.874 | 10.254 | 10.147 | 9.568 | 9.728 | 10.033 | 10.287 | 10.424 | 11.113 |
2A-06 | 9/16*18 | 14.252 | 14.031 | 13.335 | 13.221 | 12.573 | 12.751 | 13.081 | 13.371 | 13.520 | 14.288 |
2A-08 | 5/8*18 | 15.839 | 15.618 | 14.923 | 14.803 | 14.161 | 14.351 | 14.681 | 14.958 | 15.110 | 15.875 |
2A-10 | 3/4*18 | 19.014 | 18.793 | 18.098 | 17.981 | 17.336 | 17.526 | 17.856 | 18.133 | 18.285 | 19.050 |
2A-12 | 7/8*18 | 22.189 | 21.968 | 21.273 | 21.156 | 20.511 | 20.701 | 21.031 | 21.308 | 21.460 | 22.225 |
2A-16 | 1.3/16*16 | 30.124 | 29.870 | 29.093 | 28.964 | 28.232 | 28.448 | 28.804 | 29.131 | 29.299 | 30.163 |
2A-20 | 1.9/16*18 | 39.649 | 39.428 | 38.732 | 38.605 | 37.970 | 38.151 | 38.481 | 38.771 | 38.936 | 39.688 |
新西蘭B09內螺紋
標號 | 你螺紋代號 | 大徑MIN | 中徑MIN | 中徑MAX | 小徑MIN | 小徑MAX |
B-09 | 0.860in*14 | 21.844 | 20.683 | 20.841 | 19.522 |
NPTF+密封管螺紋
標號 | 螺紋代號 | 外螺紋小端中徑 | 外螺紋大端中徑 | 外螺紋小端大徑最小 | 外螺紋小端大徑最大 | 外螺紋全牙長(cháng)度 | 內螺紋大端中徑 | 內螺紋小端中徑 | 內螺紋大端小徑最小 | 內螺紋大端小徑最大 | 內螺紋全牙長(cháng)度 |
2 | 1/8-27NPTF | 9.233 | 9.652 | 9.871 | 9.960 | 6.703 | 9.489 | 9.058 | 8.763 | 8.851 | 6.924 |
4 | 1/4-18NPTF | 12.126 | 12.764 | 13.128 | 13.215 | 10.206 | 12.487 | 11.862 | 11.398 | 11.486 | 10.020 |
6 | 3/8-18NPTF | 15.545 | 16.193 | 16.547 | 16.634 | 10.358 | 15.926 | 15.281 | 14.837 | 14.924 | 10.330 |
8 | 1/2-14NPTF | 19.264 | 20.111 | 20.616 | 20.703 | 13.556 | 19.772 | 18.926 | 18.333 | 18.420 | 13.571 |
12 | 3/4-14NPTF | 24.579 | 25.445 | 25.931 | 26.018 | 13.861 | 25.117 | 24.239 | 23.678 | 23.768 | 14.054 |
16 | 1-11.5NPTF | 30.826 | 31.910 | 32.474 | 32.562 | 17.343 | 31.461 | 30.411 | 29.725 | 29.813 | 16.787 |
20 | 1.1/4-11.5NPTF | 39.551 | 40.673 | 41.199 | 41.287 | 17.953 | 40.218 | 39.136 | 38.482 | 38.570 | 17.295 |
24 | 1.1/2-11.5NPTF | 45.621 | 46.769 | 47.269 | 47.357 | 18.377 | 46.287 | 45.207 | 44.551 | 44.640 | 17.295 |
32 | 2-11.5NPTF | 57.633 | 58.834 | 59.281 | 59.369 | 19.215 | 58.325 | 57.219 | 56.589 | 56.677 | 17.701 |
40 | 2.1/2-8NPTF | 69.076 | 70.882 | 71.476 | 71.559 | 28.893 | 70.159 | 68.481 | 67.676 | 67.759 | 26.848 |
48 | 3-8NPTF | 84.852 | 86.757 | 87.252 | 87.335 | 30.480 | 86.068 | 84.257 | 83.585 | 83.668 | 28.981 |
備注：
1.表中外螺紋的完整螺紋長(cháng)度包括不超過(guò)一個(gè)螺距長(cháng)度的倒角
2.表中內螺紋的完整螺紋長(cháng)度不包括在中徑線(xiàn)和倒角交線(xiàn)外的錐口孔。即完整螺紋長(cháng)度的等于完整內螺紋加一個(gè)螺距。