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单位:英寸(inch)
| (inch) | P | ds max | ds min | s min | s max |
|---|---|---|---|---|---|
| 5/16 | 18 | 0.312 | 0.299 | 0.516 | 0.531 |
| 3/8 | 16 | 0.375 | 0.36 | 0.641 | 0.656 |
| 7/16 | 14 | 0.438 | 0.421 | 0.703 | 0.718 |
| 1/2 | 13 | 0.5 | 0.438 | 0.766 | 0.781 |
| 9/16 | 12 | 0.592 | 0.544 | 0.891 | 0.922 |
| 5/8 | 11 | 0.657 | 0.606 | 0.953 | 0.984 |
| 3/4 | 10 | 0.782 | 0.729 | 1.078 | 1.109 |
| 7/8 | 9 | 0.938 | 0.853 | 1.266 | 1.297 |
| 1 | 8 | 1.062 | 0.976 | 1.453 | 1.484 |