| 扣環 | 截面 | 孔徑 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 項目 | 標準牌號 | 單位 | 內徑 | 公差 | 厚度 | 公差 | 最大 | 公差 | 值 |
| ISTW | mm | 11 | 10.64~11.1 | 1 | 0.94~1 | 2.1 | ±0.1 | 1.3 | |
| ISTW | mm | 11.9 | 11.54~12 | 1 | 0.94~1 | 2.1 | ±0.1 | 1.3 | |
| ISTW | mm | 12.9 | 12.54~13 | 1 | 0.94~1 | 2.1 | ±0.1 | 1.3 | |
| ISTW | mm | 13.8 | 13.44~13.9 | 1 | 0.94~1 | 2.2 | ±0.1 | 1.3 | |
| ISTW | mm | 14.7 | 14.34~14.8 | 1 | 0.94~1 | 2.3 | ±0.1 | 1.3 | |
| ISTW | mm | 15.7 | 15.34~15.8 | 1 | 0.94~1 | 2.4 | ±0.1 | 1.3 | |
| ISTW | mm | 16.5 | 16.14~16.6 | 1.2 | 1.14~1.2 | 2.6 | ±0.1 | 1.5 | |
| ISTW | mm | 18.5 | 18.08~18.63 | 1.2 | 1.14~1.2 | 2.8 | ±0.1 | 1.5 | |
| ISTW | mm | 19.35 | 18.93~19.48 | 1.2 | 1.14~1.2 | 2.8 | ±0.1 | 1.5 | |
| ISTW | mm | 20.5 | 20.08~20.63 | 1.2 | 1.14~1.2 | 3 | ±0.1 | 1.5 | |
| ISTW | mm | 21.5 | 21.08~21.63 | 1.2 | 1.14~1.2 | 3.1 | ±0.1 | 1.5 | |
| ISTW | mm | 22.2 | 21.78~22.41 | 1.2 | 1.14~1.2 | 3.2 | ±0.1 | 1.5 | |
| ISTW | mm | 23.2 | 22.78~23.41 | 1.2 | 1.14~1.2 | 3.4 | ±0.1 | 1.5 | |
| ISTW | mm | 24.2 | 23.78~24.41 | 1.2 | 1.14~1.2 | 3.5 | ±0.1 | 1.5 | |
| ISTW | mm | 25.9 | 25.48~26.11 | 1.5 | 1.44~1.5 | 3.8 | ±0.1 | 2 | |