| 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 | inch | 2.693 | 2.197 | 2.180~2.214 | 0.079 | 0.076~0.081 | 0.248 | 0.098 | ±0.0196 | |
| ISTW | inch | 2.787 | 2.276 | 2.258~2.293 | 0.079 | 0.076~0.081 | 0.256 | 0.098 | ±0.0196 | |
| ISTW | inch | 2.835 | 2.315 | 2.298~2.332 | 0.079 | 0.076~0.081 | 0.26 | 0.098 | ±0.0196 | |
| ISTW | inch | 2.929 | 2.394 | 2.376~2.411 | 0.098 | 0.096~0.101 | 0.268 | 0.118 | ±0.0196 | |
| ISTW | inch | 3.051 | 2.5 | 2.483~2.517 | 0.098 | 0.096~0.101 | 0.276 | 0.118 | ±0.0196 | |
| ISTW | inch | 3.146 | 2.579 | 2.562~2.596 | 0.098 | 0.096~0.101 | 0.283 | 0.118 | ±0.0196 | |
| ISTW | inch | 3.232 | 2.657 | 2.640~2.675 | 0.098 | 0.096~0.101 | 0.287 | 0.118 | ±0.0275 | |
| ISTW | inch | 3.374 | 2.776 | 2.758~2.793 | 0.098 | 0.096~0.101 | 0.299 | 0.118 | ±0.0275 | |
| ISTW | inch | 3.516 | 2.894 | 2.876~2.911 | 0.098 | 0.096~0.101 | 0.311 | 0.118 | ±0.0275 | |
| ISTW | inch | 3.563 | 2.933 | 2.916~2.950 | 0.098 | 0.096~0.101 | 0.315 | 0.118 | ±0.0275 | |
| ISTW | inch | 3.657 | 3.012 | 2.995~3.029 | 0.098 | 0.096~0.101 | 0.323 | 0.118 | ±0.0275 | |
| ISTW | inch | 3.799 | 3.13 | 3.113~3.147 | 0.118 | 0.115~0.121 | 0.335 | 0.138 | ±0.0275 | |
| ISTW | inch | 3.933 | 3.248 | 3.227~3.269 | 0.118 | 0.115~0.121 | 0.343 | 0.138 | ±0.0275 | |
| ISTW | inch | 4.028 | 3.327 | 3.306~3.348 | 0.118 | 0.115~0.121 | 0.35 | 0.138 | ±0.0275 | |
| ISTW | inch | 4.256 | 3.524 | 3.502~3.545 | 0.118 | 0.115~0.121 | 0.366 | 0.138 | ±0.0275 | |