AS568-138 O-Ring
Inside diameter 2.112″
Cross-section 0.103″
Outside diameter 2.318″
Metric (ID × CS) 53.64 × 2.62 mm
OD is derived: ID + 2 × CS = 2.112″ + 2 × 0.103″ = 2.318″.
Neighboring sizes (CS 0.103″ series)
| Dash | ID | OD | ID mm | vs -138 |
|---|---|---|---|---|
| -136 | 1.987″ | 2.193″ | 50.47 | ID −0.125″ |
| -137 | 2.050″ | 2.256″ | 52.07 | ID −0.062″ |
| -138 | 2.112″ | 2.318″ | 53.64 | — |
| -139 | 2.175″ | 2.381″ | 55.24 | ID +0.063″ |
| -140 | 2.237″ | 2.443″ | 56.82 | ID +0.125″ |