絲攻加工下孔徑選用表 |
梅華 |
PT-Rc 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 |
1/16x28 |
6.2 |
6.384 |
6.244 |
1/8x28 |
8.2 |
8.388 |
8.249 |
1/4x19 |
11 |
11.174 |
10.962 |
3/8x19 |
14.5 |
14.658 |
14.448 |
1/2x14 |
18 |
18.263 |
17.979 |
3/4x14 |
23.5 |
23.663 |
23.378 |
1x11 |
29.5 |
29.822 |
29.459 |
1.1/4x11 |
38 |
38.339 |
37.976 |
1.1/2x11 |
44 |
44.232 |
43.869 |
2x11 |
55.5 |
55.844 |
55.412 |