| 扣環 | 截面 | 孔徑 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 項目 | 標準牌號 | 單位 | 外徑 | 內徑 | 公差 | 厚度 | 公差 | 最大 | 值 | 公差 |
| ISTW | mm | 25.5 | 19.5 | 19.3~19.7 | 1.2 | 1.14~1.26 | 3 | 1.5 | ±0.4 | |
| ISTW | mm | 26.5 | 20.5 | 20.3~20.7 | 1.2 | 1.14~1.26 | 3 | 1.5 | ±0.4 | |
| ISTW | mm | 28.6 | 22.2 | 22~22.4 | 1.2 | 1.14~1.26 | 3.2 | 1.5 | ±0.4 | |
| ISTW | mm | 29.8 | 23.2 | 23~23.4 | 1.2 | 1.14~1.26 | 3.3 | 1.5 | ±0.4 | |
| ISTW | mm | 31 | 24.2 | 24~24.4 | 1.2 | 1.14~1.26 | 3.4 | 1.5 | ±0.4 | |
| ISTW | mm | 33.1 | 25.9 | 25.7~26.1 | 1.5 | 1.44~1.56 | 3.6 | 1.8 | ±0.4 | |
| ISTW | mm | 34.1 | 26.9 | 26.7~27.1 | 1.5 | 1.44~1.56 | 3.6 | 1.8 | ±0.4 | |
| ISTW | mm | 35.5 | 27.9 | 27.7~28.1 | 1.5 | 1.44~1.56 | 3.7 | 1.8 | ±0.4 | |
| ISTW | mm | 37.4 | 29.6 | 29.4~29.8 | 1.5 | 1.44~1.56 | 3.9 | 1.8 | ±0.4 | |
| ISTW | mm | 39.7 | 31.5 | 31.25~31.75 | 1.5 | 1.44~1.56 | 4.1 | 1.8 | ±0.4 | |
| ISTW | mm | 40.6 | 32.2 | 31.95~32.45 | 1.5 | 1.44~1.56 | 4.2 | 1.8 | ±0.4 | |
| ISTW | mm | 41.6 | 33.2 | 32.95~33.45 | 1.75 | 1.68~1.82 | 4.2 | 2 | ±0.4 | |
| ISTW | mm | 44 | 35.2 | 34.95~35.45 | 1.75 | 1.68~1.82 | 4.4 | 2 | ±0.4 | |
| ISTW | mm | 46.2 | 37 | 36.6~37.4 | 1.75 | 1.68~1.82 | 4.6 | 2 | ±0.4 | |
| ISTW | mm | 48.1 | 38.5 | 38.1~38.9 | 1.75 | 1.68~1.82 | 4.8 | 2 | ±0.5 | |
