AS568-311 O-Ring
Inside diameter 0.537″
Cross-section 0.210″
Outside diameter 0.957″
Metric (ID × CS) 13.64 × 5.33 mm
OD is derived: ID + 2 × CS = 0.537″ + 2 × 0.210″ = 0.957″.
Neighboring sizes (CS 0.210″ series)
| Dash | ID | OD | ID mm | vs -311 |
|---|---|---|---|---|
| -309 | 0.412″ | 0.832″ | 10.46 | ID −0.125″ |
| -310 | 0.475″ | 0.895″ | 12.06 | ID −0.062″ |
| -311 | 0.537″ | 0.957″ | 13.64 | — |
| -312 | 0.600″ | 1.020″ | 15.24 | ID +0.063″ |
| -313 | 0.662″ | 1.082″ | 16.81 | ID +0.125″ |