| 扣環 | ||||||
|---|---|---|---|---|---|---|
| 項目 | 標準牌號 | 單位 | 外徑 | 公差 | 厚度 | 公差 |
| CSTW | mm | 31.75 | 31.50~32.00 | 0.38 | 0.34~0.43 | |
| CSTW | inch | 0.25 | 0.245~0.255 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.325 | 0.320~0.330 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.356 | 0.351~0.361 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.387 | 0.382~0.392 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.418 | 0.413~0.423 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.46 | 0.455~0.465 | 0.015 | 0.013~0.017 | |
| CSTW | inch | 0.45 | 0.445~0.455 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.512 | 0.507~0.517 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.575 | 0.570~0.580 | 0.01 | 0.009~0.011 | |
| CSTW | inch | 0.638 | 0.633~0.643 | 0.015 | 0.013~0.017 | |
| CSTW | inch | 0.75 | 0.745~0.755 | 0.015 | 0.013~0.017 | |
| CSTW | inch | 0.812 | 0.802~0.822 | 0.015 | 0.013~0.017 | |
| CSTW | inch | 0.875 | 0.865~0.885 | 0.015 | 0.013~0.017 | |
| CSTW | inch | 1 | 0.990~1.010 | 0.015 | 0.013~0.017 | |