AS568-388 O-Ring
Inside diameter 18.955″
Cross-section 0.210″
Outside diameter 19.375″
Metric (ID × CS) 481.46 × 5.33 mm
OD is derived: ID + 2 × CS = 18.955″ + 2 × 0.210″ = 19.375″.
Neighboring sizes (CS 0.210″ series)
| Dash | ID | OD | ID mm | vs -388 |
|---|---|---|---|---|
| -386 | 16.955″ | 17.375″ | 430.66 | ID −2.000″ |
| -387 | 17.955″ | 18.375″ | 456.06 | ID −1.000″ |
| -388 | 18.955″ | 19.375″ | 481.46 | — |
| -389 | 19.955″ | 20.375″ | 506.86 | ID +1.000″ |
| -390 | 20.955″ | 21.375″ | 532.26 | ID +2.000″ |
Same ID, other cross-sections
- AS568-467 — same 18.955″ ID with a 0.275″ cross-section (OD 19.505″)