| 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 | 最小 | 公差 | 值 | 公差 |
| ISTW | mm | 76.35 | 75.60~76.86 | 2.36 | 2.37~2.43 | 8.23 | ±0.203 | 4.11 | ±0.203 | 3.05 | +0.381,-0.050 | |
| ISTW | mm | 82.22 | 81.46~82.72 | 2.77 | 2.77~2.84 | 8.76 | ±0.203 | 4.39 | ±0.203 | 3.18 | +0.381,-0.050 | |
| ISTW | mm | 92.51 | 91.75~93.01 | 2.77 | 2.77~2.84 | 9.35 | ±0.203 | 4.65 | ±0.203 | 3.18 | +0.381,-0.050 | |
| ISTW | inch | 0.461 | 0.451~0.466 | 0.035 | 0.033~0.037 | 0.08 | ±0.004 | 0.041 | ±0.004 | 0.042 | +0.010,-0.002 | |
| ISTW | inch | 0.521 | 0.511~0.526 | 0.035 | 0.033~0.037 | 0.088 | ±0.004 | 0.043 | ±0.004 | 0.042 | +0.010,-0.002 | |
| ISTW | inch | 0.55 | 0.540~0.555 | 0.035 | 0.033~0.037 | 0.092 | ±0.004 | 0.046 | ±0.004 | 0.042 | +0.010,-0.002 | |
| ISTW | inch | 0.579 | 0.569~0.584 | 0.035 | 0.033~0.037 | 0.096 | ±0.004 | 0.048 | ±0.004 | 0.042 | +0.010,-0.002 | |
| ISTW | inch | 0.635 | 0.625~0.640 | 0.042 | 0.040~0.044 | 0.104 | ±0.005 | 0.052 | ±0.005 | 0.042 | +0.010,-0.002 | |
| ISTW | inch | 0.693 | 0.683~0.698 | 0.042 | 0.040~0.044 | 0.112 | ±0.005 | 0.056 | ±0.005 | 0.042 | +0.010,-0.002 | |
| ISTW | inch | 0.722 | 0.712~0.727 | 0.042 | 0.040~0.044 | 0.116 | ±0.005 | 0.057 | ±0.005 | 0.042 | +0.010,-0.002 | |
| ISTW | inch | 0.751 | 0.741~0.756 | 0.042 | 0.040~0.044 | 0.12 | ±0.005 | 0.06 | ±0.005 | 0.05 | +0.010,-0.002 | |
| ISTW | inch | 0.81 | 0.800~0.815 | 0.042 | 0.040~0.044 | 0.128 | ±0.005 | 0.064 | ±0.005 | 0.05 | +0.010,-0.002 | |
| ISTW | inch | 0.867 | 0.857~0.872 | 0.042 | 0.040~0.044 | 0.136 | ±0.005 | 0.068 | ±0.005 | 0.05 | +0.010,-0.002 | |
| ISTW | inch | 0.925 | 0.915~0.930 | 0.042 | 0.040~0.044 | 0.144 | ±0.005 | 0.072 | ±0.005 | 0.05 | +0.010,-0.002 | |
| ISTW | inch | 0.982 | 0.967~0.992 | 0.05 | 0.048~0.052 | 0.147 | ±0.006 | 0.073 | ±0.006 | 0.078 | +0.015,-0.002 | |