美制粗螺纹 | | 美制细螺纹 | |||||||
规格 (UNC) | 标准径 | 2级牙钻孔径 | 规格 (UNF) | 标准径 | 2级牙钻孔径 | ||||
最大 | 最小 | 最大 | 最小 | ||||||
NO.1-64(1.854) | 1.55 | 1.582 | 1.425 | NO.0-80(1.524) | 1.25 | 1.305 | 1.182 | ||
NO.2-56(2.184) | 1.80 | 1.871 | 1.695 | NO.1-72(1.854) | 1.55 | 1.612 | 1.474 | ||
NO.3-48(2.515) | 2.10 | 2.146 | 1.941 | NO.2-64(2.184) | 1.85 | 1.912 | 1.756 | ||
NO.4-40(2.845) | 2.30 | 2.385 | 2.157 | NO.3-56(2.515) | 2.10 | 2.197 | 2.025 | ||
NO.5-40(3.175) | 2.60 | 2.697 | 2.487 | NO.4-48(2.845) | 2.40 | 2.458 | 2.271 | ||
NO.6-32(3.505) | 2.80 | 2.895 | 2.642 | NO.5-44(3.175) | 2.70 | 2.740 | 2.551 | ||
NO.8-32(4.166) | 3.40 | 3.530 | 3.302 | NO.6-40(3.505) | 2.90 | 3.022 | 2.820 | ||
NO.10-24(4.826) | 3.90 | 3.962 | 3.683 | NO.8-36(4.166) | 3.50 | 3.606 | 3.404 | ||
NO.12-24(5.486) | 4.50 | 4.597 | 4.344 | NO.10-32(4.826) | 4.10 | 4.165 | 3.963 | ||
1/4 -20 | 5.10 | 5.257 | 4.979 | NO.12-28(5.846) | 4.60 | 4.724 | 4.496 | ||
5/16 -18 | 6.60 | 6.731 | 6.401 | 1/4-28 | 5.50 | 5.588 | 5.360 | ||
3/8 -16 | 8.00 | 8.153 | 7.798 | 5/16-24 | 6.90 | 7.035 | 6.782 | ||
7/16 -14 | 9.40 | 9.550 | 9.144 | 3/8-24 | 8.50 | 8.636 | 8.382 | ||
1/2 -13 | 10.80 | 11.023 | 10.592 | 7/16-20 | 9.90 | 10.033 | 9.729 | ||
9/16 -12 | 12.20 | 12.446 | 11.989 | 1/2-20 | 11.50 | 11.607 | 11.329 | ||
5/8 -11 | 13.60 | 12.868 | 13.386 | 9/16-18 | 12.90 | 13.081 | 12.751 | ||
3/4 -10 | 16.50 | 18.840 | 16.307 | 5/8-18 | 14.50 | 14.681 | 14.351 | ||
7/8 -9 | 19.50 | 19.761 | 19.177 | 3/4-16 | 17.50 | 17.678 | 17.323 | ||
1-8 | 22.20 | 22.606 | 21.971 | 7/8-14 | 20.50 | 20.675 | 20.270 | ||
1-1/8-7 | 25.00 | 25.349 | 24.638 | 1-12 | 23.20 | 23.571 | 23.114 | ||
1-1/4-7 | 28.20 | 28.524 | 27.813 | 1-1/8-12 | 26.50 | 26.746 | 26.289 | ||
1-3/8-6 | 30.80 | 31.115 | 30.353 | 1-1/4-12 | 29.50 | 29.921 | 29.464 | ||
1-1/2-6 | 34.00 | 34.290 | 33.528 | 1-3/8-12 | 32.80 | 33.096 | 32.639 | ||
1-3/4-5 | 39.50 | 39.827 | 38.964 | 1-1/2-12 | 36.0 | 36.271 | 35.814 | ||
2-4-1/2 | 45.20 | 45.593 | 44.679 | | | | | ||
美制迫牙丝攻钻孔径 | 美制特细螺纹 | ||||||||
规格 | 精度等级 | 规格 (UNEF) | 标准径 | 2级牙钻孔径 | |||||
G4-G6 | G7-G8 | G9 | 最大 | 最小 | |||||
NO.2-56UNC | 1.94 | - | - | NO.12-32 | 4.70 | 4.826 | 4.623 | ||
NO.3-48 | 2.23 | - | - | 1/4--32 | 5.60 | 5.690 | 5.486 | ||
NO.4-40 | 2.50 | - | - | 5/16-32 | 7.10 | 7.264 | 7.087 | ||
NO.5-40 | 2.83 | - | - | 3/8-32 | 8.70 | 8.865 | 8.661 | ||
NO.6-32 | 3.07 | - | - | 7/16-28 | 10.20 | 10.338 | 10.135 | ||
NO.8-32 | 3.73 | 3.77 | - | 1/2-28 | 11.80 | 11.938 | 11.709 | ||
NO.10-24 | 4.24 | 4.30 | - | 9/16-24 | 13.20 | 13.386 | 13.132 | ||
NO.12-24 | 4.90 | 4.96 | - | 5/8-24 | 14.80 | 14.986 | 14.732 | ||
1/4-20 | - | 5.72 | - | 3/4-20 | 17.80 | 17.958 | 17.678 | ||
5/16-18 | - | 7.24 | - | 7/8-20 | 21.00 | 21.133 | 20.853 | ||
3/8-16 | - | 8.74 | 8.81 | 1-20 | 24.00 | 24.308 | 24.028 | ||
7/16-14 | - | 10.20 | 10.30 | 美制管螺纹 | |||||
1/2-13 | | 11.27 | 11.82 | ||||||
NO.2-64UNF | 1.97 | - | - | 规格 | 钻孔径 | ||||
NO.3-56 | 2.27 | - | - | NPT | NPS | ||||
NO.4-48 | 2.56 | - | - | 使用绞刀时 | 不用绞刀时 | ||||
NO.5-44 | 2.86 | - | - | 1/16-27 | 6.10 | 6.25 | 6.35 | ||
NO.6-40 | 3.16 | - | - | 1/8-27 | 8.33 | 8.43 | 8.74 | ||
NO.8-36 | 3.78 | - | - | 1/4-18 | 10.72 | 11.13 | 11.13 | ||
NO.10-32 | 4.39 | 4.43 | - | 3/8-18 | 14.27 | 14.27 | 14.68 | ||
NO.12-28 | 4.99 | 5.04 | - | 1/2-14 | 17.48 | 17.86 | 18.26 | ||
1/4-28 | 5.85 | 5.90 | - | 3/4-14 | 22.63 | 23.01 | 23.42 | ||
5/16-24 | 7.36 | 7.41 | - | 1-11-1/2 | 28.58 | 28.98 | 29.36 | ||
3/8-24 | - | 9.00 | - | 1-1/4-11-1/2 | 37.31 | 37.69 | 38.10 | ||
7/16-20 | - | 10.48 | 10.54 | 1-1/2-11-1/2 | 43.66 | 44.04 | 44.45 | ||
1/2-20 | - | 12.07 | 12.13 | 2-11-1/2 | 55.58 | 55.96 | 56.36 | ||
| | | | 英制电器螺纹 | | | |||
| | | | | | ||||
| | | | 规格 | 钻孔径 | | | ||
| | | | 2BA | 4.0-4.2 | | | ||
| | | | 3BA | | | | ||
| | | | 4BA | 3.0-3.2 | | | ||
| | | | 5BA | 2.7-2.8 | | | ||
| | | | 6BA | 2.4-2.5 | | |