| 扣環 | 截面 | 孔徑 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 項目 | 標準牌號 | 單位 | 外徑 | 公差 | 厚度 | 公差 | 最大 | 公差 | 最小 | 公差 | 值 | 公差 |
| IRTW | inch | 2.7 | 2.685~2.725 | 0.078 | 0.075~0.081 | 0.254 | ±0.007 | 0.12 | ±0.007 | 0.094 | +0.015,-0.002 | |
| IRTW | inch | 2.84 | 2.820~2.870 | 0.093 | 0.090~0.096 | 0.266 | ±0.007 | 0.128 | ±0.007 | 0.109 | +0.015,-0.002 | |
| IRTW | inch | 2.975 | 2.955~3.005 | 0.093 | 0.090~0.096 | 0.278 | ±0.007 | 0.134 | ±0.007 | 0.109 | +0.015,-0.002 | |
| IRTW | inch | 3.063 | 3.043~3.093 | 0.093 | 0.090~0.096 | 0.286 | ±0.007 | 0.139 | ±0.007 | 0.109 | +0.015,-0.002 | |
| IRTW | inch | 3.105 | 3.085~3.135 | 0.093 | 0.090~0.096 | 0.29 | ±0.007 | 0.139 | ±0.007 | 0.109 | +0.015,-0.002 | |
| IRTW | inch | 3.245 | 3.225~3.275 | 0.093 | 0.090~0.096 | 0.302 | ±0.007 | 0.143 | ±0.007 | 0.109 | +0.015,-0.002 | |
| IRTW | inch | 3.408 | 3.388~3.438 | 0.109 | 0.106~0.112 | 0.314 | ±0.008 | 0.149 | ±0.008 | 0.125 | +0.015,-0.002 | |
| IRTW | inch | 3.509 | 3.489~3.539 | 0.109 | 0.106~0.112 | 0.318 | ±0.008 | 0.151 | ±0.008 | 0.125 | +0.015,-0.002 | |
| IRTW | inch | 3.611 | 3.591~3.641 | 0.109 | 0.106~0.112 | 0.321 | ±0.008 | 0.155 | ±0.008 | 0.125 | +0.015,-0.002 | |
| IRTW | inch | 3.78 | 3.760~3.810 | 0.109 | 0.106~0.112 | 0.324 | ±0.008 | 0.154 | ±0.008 | 0.125 | +0.015,-0.002 | |
| IRTW | inch | 3.85 | 3.830~3.880 | 0.109 | 0.106~0.112 | 0.326 | ±0.008 | 0.155 | ±0.008 | 0.125 | +0.015,-0.002 | |
| IRTW | inch | 4.35 | 4.330~4.380 | 0.109 | 0.106~0.112 | 0.338 | ±0.008 | 0.161 | ±0.008 | 0.125 | +0.015,-0.002 | |