| 扣環 | ||||||||
|---|---|---|---|---|---|---|---|---|
| 項目 | 標準牌號 | 單位 | 外徑 | 公差 | 內徑 | 公差 | 厚度 | 公差 |
| ETW | mm | 1.5 | 1.4~1.6 | 0.6 | 0.58~0.62 | 0.2 | 0.18~0.22 | |
| ETW | mm | 2 | 1.9~2.1 | 0.67 | 0.59~0.67 | 0.2 | 0.18~0.22 | |
| ETW | mm | 2 | 1.9~2.1 | 0.8 | 0.72~0.8 | 0.2 | 0.18~0.22 | |
| ETW | mm | 2.8 | 2.7~2.9 | 0.98 | 0.89~0.98 | 0.2 | 0.18~0.22 | |
| ETW | mm | 3 | 2.9~3.1 | 1.2 | 1.11~1.2 | 0.3 | 0.275~0.325 | |
| ETW | mm | 4 | 3.8~4.2 | 1.5 | 1.41~1.5 | 0.4 | 0.37~0.43 | |
| ETW | mm | 4.5 | 4.3~4.7 | 1.9 | 1.81~1.9 | 0.4 | 0.37~0.43 | |
| ETW | mm | 5 | 4.8~5.2 | 2 | 1.91~2 | 0.4 | 0.37~0.43 | |
| ETW | mm | 6 | 5.8~6.2 | 2.3 | 2.21~2.3 | 0.4 | 0.37~0.43 | |
| ETW | mm | 6 | 5.8~6.2 | 2.5 | 2.41~2.5 | 0.4 | 0.37~0.43 | |
| ETW | mm | 7 | 6.8~7.2 | 3 | 2.91~3 | 0.6 | 0.56~0.64 | |
| ETW | mm | 7 | 6.8~7.2 | 3.2 | 3.08~3.2 | 0.6 | 0.56~0.64 | |
| ETW | mm | 8 | 7.8~8.2 | 3.5 | 3.38~3.5 | 0.6 | 0.56~0.64 | |
| ETW | mm | 9 | 8.8~9.2 | 4 | 3.88~4 | 0.6 | 0.56~0.64 | |
| ETW | mm | 11 | 10.8~11.2 | 5 | 4.88~5 | 0.6 | 0.56~0.64 | |