AS568-440 O-Ring
Inside diameter 6.725″
Cross-section 0.275″
Outside diameter 7.275″
Metric (ID × CS) 170.81 × 6.99 mm
OD is derived: ID + 2 × CS = 6.725″ + 2 × 0.275″ = 7.275″.
Neighboring sizes (CS 0.275″ series)
| Dash | ID | OD | ID mm | vs -440 |
|---|---|---|---|---|
| -438 | 6.225″ | 6.775″ | 158.11 | ID −0.500″ |
| -439 | 6.475″ | 7.025″ | 164.46 | ID −0.250″ |
| -440 | 6.725″ | 7.275″ | 170.81 | — |
| -441 | 6.975″ | 7.525″ | 177.16 | ID +0.250″ |
| -442 | 7.225″ | 7.775″ | 183.51 | ID +0.500″ |
Same ID, other cross-sections
- AS568-364 — same 6.725″ ID with a 0.210″ cross-section (OD 7.145″)