AS568-228 O-Ring
Inside diameter 2.234″
Cross-section 0.139″
Outside diameter 2.512″
Metric (ID × CS) 56.74 × 3.53 mm
OD is derived: ID + 2 × CS = 2.234″ + 2 × 0.139″ = 2.512″.
Neighboring sizes (CS 0.139″ series)
| Dash | ID | OD | ID mm | vs -228 |
|---|---|---|---|---|
| -226 | 1.984″ | 2.262″ | 50.39 | ID −0.250″ |
| -227 | 2.109″ | 2.387″ | 53.57 | ID −0.125″ |
| -228 | 2.234″ | 2.512″ | 56.74 | — |
| -229 | 2.359″ | 2.637″ | 59.92 | ID +0.125″ |
| -230 | 2.484″ | 2.762″ | 63.09 | ID +0.250″ |