| 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 | 65.5 | 64.4~65.96 | 2.5 | 2.43~2.5 | 6.5 | ±0.3 | 2.5 | |
| ISTW | mm | 67.5 | 66.4~67.96 | 2.5 | 2.43~2.5 | 6.5 | ±0.3 | 2.5 | |
| ISTW | mm | 70.5 | 69.4~70.96 | 2.5 | 2.43~2.5 | 6.5 | ±0.3 | 2.5 | |
| ISTW | mm | 74.5 | 73.4~74.96 | 2.5 | 2.43~2.5 | 7 | ±0.3 | 2.5 | |
| ISTW | mm | 76.5 | 75.4~76.96 | 2.5 | 2.43~2.5 | 7 | ±0.3 | 2.5 | |
| ISTW | mm | 79.5 | 78.4~79.96 | 3 | 2.92~3 | 7.4 | ±0.3 | 3 | |
| ISTW | mm | 81.5 | 80.2~82.04 | 3 | 2.92~3 | 7.4 | ±0.3 | 3 | |
| ISTW | mm | 84.5 | 83.2~85.04 | 3 | 2.92~3 | 7.4 | ±0.3 | 3 | |
| ISTW | mm | 89.5 | 88.2~90.04 | 3 | 2.92~3 | 8 | ±0.3 | 3 | |
| ISTW | mm | 94.5 | 93.2~95.04 | 3 | 2.92~3 | 8 | ±0.3 | 3 | |
| ISTW | inch | 0.433 | 0.419~0.437 | 0.039 | 0.038~0.039 | 0.083 | ±0.0039 | 0.051 | |
| ISTW | inch | 0.469 | 0.455~0.472 | 0.039 | 0.038~0.039 | 0.083 | ±0.0039 | 0.051 | |
| ISTW | inch | 0.508 | 0.494~0.511 | 0.039 | 0.038~0.039 | 0.083 | ±0.0039 | 0.051 | |
| ISTW | inch | 0.543 | 0.530~0.547 | 0.039 | 0.038~0.039 | 0.087 | ±0.0039 | 0.051 | |
| ISTW | inch | 0.579 | 0.565~0.582 | 0.039 | 0.038~0.039 | 0.091 | ±0.0039 | 0.051 | |