AS568-439 O-Ring
Inside diameter 6.475″
Cross-section 0.275″
Outside diameter 7.025″
Metric (ID × CS) 164.46 × 6.99 mm
OD is derived: ID + 2 × CS = 6.475″ + 2 × 0.275″ = 7.025″.
Neighboring sizes (CS 0.275″ series)
| Dash | ID | OD | ID mm | vs -439 |
|---|---|---|---|---|
| -437 | 5.975″ | 6.525″ | 151.76 | ID −0.500″ |
| -438 | 6.225″ | 6.775″ | 158.11 | ID −0.250″ |
| -439 | 6.475″ | 7.025″ | 164.46 | — |
| -440 | 6.725″ | 7.275″ | 170.81 | ID +0.250″ |
| -441 | 6.975″ | 7.525″ | 177.16 | ID +0.500″ |
Same ID, other cross-sections
- AS568-363 — same 6.475″ ID with a 0.210″ cross-section (OD 6.895″)