AS568-243 O-Ring
Inside diameter 4.109″
Cross-section 0.139″
Outside diameter 4.387″
Metric (ID × CS) 104.37 × 3.53 mm
OD is derived: ID + 2 × CS = 4.109″ + 2 × 0.139″ = 4.387″.
Neighboring sizes (CS 0.139″ series)
| Dash | ID | OD | ID mm | vs -243 |
|---|---|---|---|---|
| -241 | 3.859″ | 4.137″ | 98.02 | ID −0.250″ |
| -242 | 3.984″ | 4.262″ | 101.19 | ID −0.125″ |
| -243 | 4.109″ | 4.387″ | 104.37 | — |
| -244 | 4.234″ | 4.512″ | 107.54 | ID +0.125″ |
| -245 | 4.359″ | 4.637″ | 110.72 | ID +0.250″ |