| 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 | 89.3 | 73.5 | 73.05~73.95 | 2.5 | 2.42~2.58 | 7.9 | 3 | ±0.7 | |
| ISTW | mm | 90.5 | 74.5 | 74.05~74.95 | 2.5 | 2.42~2.58 | 8 | 3 | ±0.7 | |
| ISTW | mm | 92.9 | 76.5 | 76.05~76.95 | 2.5 | 2.42~2.58 | 8.2 | 3 | ±0.7 | |
| ISTW | mm | 96.5 | 79.5 | 79.05~79.95 | 3 | 2.91~3.09 | 8.5 | 3.5 | ±0.7 | |
| ISTW | mm | 99.9 | 82.5 | 81.95~83.05 | 3 | 2.91~3.09 | 8.7 | 3.5 | ±0.7 | |
| ISTW | mm | 102.3 | 84.5 | 83.95~85.05 | 3 | 2.91~3.09 | 8.9 | 3.5 | ±0.7 | |
| ISTW | mm | 108.1 | 89.5 | 88.95~90.05 | 3 | 2.91~3.09 | 9.3 | 3.5 | ±0.7 | |
| ISTW | mm | 113.9 | 94.5 | 93.95~95.05 | 3 | 2.91~3.09 | 9.7 | 3.5 | ±0.7 | |
| ISTW | inch | 0.315 | 0.22 | 0.213~0.224 | 0.02 | 0.019~0.020 | 0.047 | 0.087 | ±0.0078 | |
| ISTW | inch | 0.366 | 0.256 | 0.249~0.259 | 0.024 | 0.023~0.025 | 0.055 | 0.102 | ±0.0078 | |
| ISTW | inch | 0.417 | 0.291 | 0.284~0.295 | 0.028 | 0.026~0.029 | 0.063 | 0.118 | ±0.0078 | |
| ISTW | inch | 0.472 | 0.331 | 0.323~0.334 | 0.031 | 0.030~0.033 | 0.071 | 0.134 | ±0.0078 | |
| ISTW | inch | 0.524 | 0.366 | 0.361~0.372 | 0.039 | 0.038~0.041 | 0.079 | 0.047 | ±0.0118 | |
| ISTW | inch | 0.567 | 0.402 | 0.396~0.407 | 0.039 | 0.038~0.041 | 0.083 | 0.047 | ±0.0118 | |
| ISTW | inch | 0.61 | 0.437 | 0.430~0.444 | 0.039 | 0.038~0.041 | 0.087 | 0.047 | ±0.0118 | |