AS568-218 O-Ring
Inside diameter 1.234″
Cross-section 0.139″
Outside diameter 1.512″
Metric (ID × CS) 31.34 × 3.53 mm
OD is derived: ID + 2 × CS = 1.234″ + 2 × 0.139″ = 1.512″.
Neighboring sizes (CS 0.139″ series)
| Dash | ID | OD | ID mm | vs -218 |
|---|---|---|---|---|
| -216 | 1.109″ | 1.387″ | 28.17 | ID −0.125″ |
| -217 | 1.171″ | 1.449″ | 29.74 | ID −0.063″ |
| -218 | 1.234″ | 1.512″ | 31.34 | — |
| -219 | 1.296″ | 1.574″ | 32.92 | ID +0.062″ |
| -220 | 1.359″ | 1.637″ | 34.52 | ID +0.125″ |