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美制锯齿形螺纹的3级公差值 in |
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牙数 |
螺距 P |
基 本 大 径 |
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≥0.5 ≤0.7 |
＞0.7 ≤1.0 |
＞1.0 ≤1.5 |
＞1.5 ≤2.5 |
＞2.5 ≤4 |
＞4 ≤6 |
＞6 ≤10 |
＞10 ≤16 |
＞16 ≤24 |
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外螺纹的大径和中径公差，内螺纹的中径和小径公差 |
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20 |
0.050 0 |
0.003 7 |
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16 |
0.062 5 |
0.004 0 |
0.004 2 |
0.004 3 |
0.004 6 |
0.004 9 |
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12 |
0.083 3 |
0.004 4 |
0.004 6 |
0.004 8 |
0.005 0 |
0.005 3 |
0.005 6 |
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10 |
0.100 0 |
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0.004 9 |
0.005 1 |
0.005 3 |
0.005 6 |
0.005 9 |
0.006 3 |
0.006 8 |
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8 |
0.125 0 |
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0.005 5 |
0.005 8 |
0.006 1 |
0.006 4 |
0.006 7 |
0.007 2 |
0.007 7 |
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6 |
0.166 7 |
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0.006 1 |
0.006 4 |
0.006 7 |
0.007 0 |
0.007 4 |
0.007 8 |
0.008 3 |
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5 |
0.200 0 |
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0.006 8 |
0.007 1 |
0.007 4 |
0.007 8 |
0.008 3 |
0.008 8 |
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4 |
0.250 0 |
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0.007 4 |
0.007 7 |
0.008 0 |
0.008 4 |
0.008 9 |
0.009 4 |
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3 |
0.333 3 |
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0.008 9 |
0.009 3 |
0.009 8 |
0.010 3 |
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21/2 |
0.400 0 |
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0.010 0 |
0.010 4 |
0.010 9 |
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2 |
0.500 0 |
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0.010 8 |
0.011 3 |
0.011 8 |
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11/2 |
0.666 7 |
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0.012 6 |
0.013 0 |
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11/4 |
0.800 0 |
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0.013 5 |
0.013 9 |
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1 |
1.000 0 |
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0.015 2 |
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注：当旋合长度为10P 时，3级螺纹的公差等于2级螺纹公差的2/3倍。 |
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