| 扣環 | 截面 | |||||||
|---|---|---|---|---|---|---|---|---|
| 項目 | 標準牌號 | 單位 | 外徑 | 內徑 | 公差 | 厚度 | 公差 | 最大 |
| CTW | mm | 20.4 | 15.8 | 15.62~15.98 | 1.2 | 1.14~1.2 | 2.3 | |
| CTW | mm | 21.5 | 16.7 | 16.52~16.88 | 1.2 | 1.14~1.2 | 2.4 | |
| CTW | mm | 22.65 | 17.55 | 17.37~17.73 | 1.2 | 1.14~1.2 | 2.55 | |
| CTW | mm | 25 | 19.4 | 19.19~19.61 | 1.2 | 1.14~1.2 | 2.8 | |
| CTW | mm | 26 | 20.2 | 19.99~20.41 | 1.2 | 1.14~1.2 | 2.9 | |
| CTW | mm | 27.1 | 21.1 | 20.89~21.31 | 1.2 | 1.14~1.2 | 3 | |
| CTW | mm | 28.3 | 22 | 21.79~22.21 | 1.2 | 1.14~1.2 | 3.15 | |
| CTW | mm | 29.4 | 22.9 | 22.69~23.11 | 1.2 | 1.14~1.2 | 3.25 | |
| CTW | mm | 31.6 | 24.6 | 24.39~24.81 | 1.5 | 1.44~1.5 | 3.5 | |
| CTW | mm | 33.7 | 26.3 | 26.09~26.51 | 1.5 | 1.44~1.5 | 3.7 | |
| CTW | mm | 36.1 | 28.1 | 27.89~28.31 | 1.5 | 1.44~1.5 | 4 | |
| CTW | mm | 39.4 | 30.8 | 30.55~31.05 | 1.5 | 1.44~1.5 | 4.3 | |
| CTW | mm | 40.5 | 31.7 | 31.45~31.95 | 1.75 | 1.69~1.75 | 4.4 | |
| CTW | mm | 42.6 | 33.4 | 33.15~33.65 | 1.75 | 1.69~1.75 | 4.6 | |
| CTW | mm | 45 | 35.2 | 34.81~35.59 | 1.75 | 1.69~1.75 | 4.9 | |