| 扣環 | |||||||
|---|---|---|---|---|---|---|---|
| 項目 | 標準牌號 | 單位 | 外徑 | 內徑 | 公差 | 厚度 | 公差 |
| ETW | mm | 2 | 0.64 | 0.56~0.67 | 0.25 | 0.2~0.3 | |
| ETW | mm | 4 | 1.3 | 1.22~1.33 | 0.25 | 0.2~0.3 | |
| ETW | mm | 5.6 | 2.1 | 2.02~2.13 | 0.4 | 0.34~0.46 | |
| ETW | mm | 7.2 | 2.9 | 2.82~2.93 | 0.6 | 0.54~0.66 | |
| ETW | mm | 8.5 | 3.7 | 3.62~3.73 | 0.6 | 0.54~0.66 | |
| ETW | mm | 11.1 | 4.7 | 4.62~4.73 | 0.6 | 0.54~0.66 | |
| ETW | mm | 13.4 | 5.25 | 5.17~5.28 | 0.6 | 0.54~0.66 | |
| ETW | mm | 14.6 | 6.15 | 6.05~6.2 | 0.6 | 0.54~0.66 | |
| ETW | mm | 15.8 | 6.8 | 6.7~6.85 | 0.9 | 0.84~0.96 | |
| ETW | mm | 16.8 | 7.6 | 7.5~7.65 | 0.9 | 0.84~0.96 | |
| ETW | mm | 17.4 | 8.55 | 8.45~8.6 | 0.9 | 0.84~0.96 | |
| ETW | mm | 18.6 | 9.2 | 9.1~9.25 | 1.1 | 1.04~1.16 | |
| ETW | mm | 20.3 | 9.95 | 9.85~10 | 1.1 | 1.04~1.16 | |
| ETW | mm | 22.8 | 11.4 | 11.25~11.5 | 1.1 | 1.04~1.16 | |
| ETW | mm | 23.8 | 12.15 | 12~12.25 | 1.1 | 1.04~1.16 | |