絲攻加工下孔徑選用表 |
梅華 |
NPSC 英制管用螺紋 |
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錐管內螺紋 |
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螺紋尺寸 |
建議孔徑 |
最大尺寸 |
最小尺寸 |
1/16x27 |
6.4 |
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1/8x27 |
8.8 |
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1/4x18 |
11.2 |
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3/8x18 |
14.3 |
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1/2x14 |
18.3 |
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3/4x14 |
23.5 |
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1x11.1/2 |
29.5 |
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1.1/4x11.1/2 |
38 |
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1.1/2x11.1/2 |
44.5 |
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2x11.1/2 |
56.5 |
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2.1/2x8 |
67.5 |