螺丝攻牙钻孔径和滚造径对照表 |
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英制螺纹 |
公制螺纹 |
针车用螺纹 |
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规格(UNEF) |
钻孔径 |
规格 |
滚造径 |
规格 |
滚造径 |
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硬材 |
软材 |
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W 1/8 - 40 |
2.65 |
2.60 |
M3×0.5 |
2.63-2.60 |
SM1/8-40 |
2.735-2.688 |
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W 5/32 - 32 |
3.25 |
3.20 |
M3.0×0.6 |
2.56-2.53 |
SM1/8-44 |
2.769-2.722 |
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W 3/16 - 24 |
3.75 |
3.70 |
M3.5×0.6 |
3.06-3.03 |
SM9/64-40 |
3.128-3.083 |
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W 1/4 - 20 |
5.10 |
5.00 |
M4.0×0.7 |
3.49-3.45 |
SM11/64-40 |
3.855-3.805 |
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W 5/16 - 18 |
6.60 |
6.50 |
M4.0×0.75 |
3.45-3.41 |
SM3/16-32 |
4.205-4.155 |
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W 3/8 - 16 |
8.00 |
7.90 |
M4.5×0.75 |
3.96-3.92 |
SM3/16-28 |
4.143-4.093 |
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W 7/16 - 14 |
9.40 |
9.30 |
M5.0×0.8 |
4.43-4.38 |
SM7/32-32 |
5.003-4.955 |
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W 1/2 - 12 |
10.70 |
10.50 |
M5.0×0.9 |
4.36-4.31 |
SM15/64-28 |
5.325-5.570 |
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W 9/16 - 12 |
12.30 |
12.00 |
M6.0×1.0 |
5.30-5.25 |
SM1/4-40 |
5.890-5.735 |
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W 5/8 - 11 |
13.70 |
13.50 |
M7.0×1.0 |
6.30-6.25 |
SM1/4-28 |
5.721-5.366 |
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W 3/4 - 10 |
16.70 |
16.50 |
M8.0×1.0 |
7.28-7.23 |
SM9/32-28 |
6.508-6.648 |
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W 7/8 - 9 |
19.50 |
19.30 |
M8.0×1.25 |
7.12-7.07 |
SM11/32-28 |
8.092-8.432 |
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W1 - 8 |
22.40 |
22.00 |
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SM3/8-28 |
8.880-8.015 |
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W 1-1/8 - 7 |
25.00 |
24.80 |
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SM7/16-28 |
10.466-10.401 |
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W 1 - 1/4 - 7 |
28.30 |
28.00 |
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SM7/16-16 |
10.037-9.967 |
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SM1/2-20 |
11.819-11.749 |
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SM9/26-20 |
13.400-13.425 |
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