AS568-238 O-Ring
Inside diameter 3.484″
Cross-section 0.139″
Outside diameter 3.762″
Metric (ID × CS) 88.49 × 3.53 mm
OD is derived: ID + 2 × CS = 3.484″ + 2 × 0.139″ = 3.762″.
Neighboring sizes (CS 0.139″ series)
| Dash | ID | OD | ID mm | vs -238 |
|---|---|---|---|---|
| -236 | 3.234″ | 3.512″ | 82.14 | ID −0.250″ |
| -237 | 3.359″ | 3.637″ | 85.32 | ID −0.125″ |
| -238 | 3.484″ | 3.762″ | 88.49 | — |
| -239 | 3.609″ | 3.887″ | 91.67 | ID +0.125″ |
| -240 | 3.734″ | 4.012″ | 94.84 | ID +0.250″ |