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单位:英寸(inch)
| (inch) | P | k max | k min | s max | s min | 
|---|---|---|---|---|---|
| #4 | 40 | 0.125 | 0.112 | 0.252 | 0.24 | 
| #6 | 32 | 0.141 | 0.126 | 0.314 | 0.302 | 
| #8 | 32 | 0.188 | 0.14 | 0.346 | 0.334 | 
| #10 | 32 | 0.188 | 0.147 | 0.377 | 0.365 | 
| 1/4 | 28 | 0.219 | 0.177 | 0.439 | 0.43 | 
| 5/16 | 24 | 0.266 | 0.239 | 0.502 | 0.492 | 
| 3/8 | 24 | 0.282 | 0.269 | 0.564 | 0.553 | 
| 7/16 | 20 | 0.328 | 0.315 | 0.69 | 0.679 |