AS568-338 O-Ring
Inside diameter 3.100″
Cross-section 0.210″
Outside diameter 3.520″
Metric (ID × CS) 78.74 × 5.33 mm
OD is derived: ID + 2 × CS = 3.100″ + 2 × 0.210″ = 3.520″.
Neighboring sizes (CS 0.210″ series)
| Dash | ID | OD | ID mm | vs -338 |
|---|---|---|---|---|
| -336 | 2.850″ | 3.270″ | 72.39 | ID −0.250″ |
| -337 | 2.975″ | 3.395″ | 75.56 | ID −0.125″ |
| -338 | 3.100″ | 3.520″ | 78.74 | — |
| -339 | 3.225″ | 3.645″ | 81.91 | ID +0.125″ |
| -340 | 3.350″ | 3.770″ | 85.09 | ID +0.250″ |