美制粗螺纹 |
美制细螺纹 |
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规格 (UNC) |
标准径 |
2级牙钻孔径 |
规格 (UNF) |
标准径 |
2级牙钻孔径 |
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最大 |
最小 |
最大 |
最小 |
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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 |
|
5/16 -18 |
6.60 |
6.731 |
6.401 |
1/4-28 |
5.50 |
5.588 |
5.360 |
|
7/8 -9 |
19.50 |
19.761 |
19.177 |
3/4-16 |
17.50 |
17.678 |
17.323 |
|
1-1/8-7 |
25.00 |
25.349 |
24.638 |
1-12 |
23.20 |
23.571 |
23.114 |
|
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 |
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