AS568-309 O-Ring
Inside diameter 0.412″
Cross-section 0.210″
Outside diameter 0.832″
Metric (ID × CS) 10.46 × 5.33 mm
OD is derived: ID + 2 × CS = 0.412″ + 2 × 0.210″ = 0.832″.
Neighboring sizes (CS 0.210″ series)
| Dash | ID | OD | ID mm | vs -309 |
|---|---|---|---|---|
| -309 | 0.412″ | 0.832″ | 10.46 | — |
| -310 | 0.475″ | 0.895″ | 12.06 | ID +0.063″ |
| -311 | 0.537″ | 0.957″ | 13.64 | ID +0.125″ |