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AS568-461 O-Ring Size
400 series · 1/4" cross section · Industrial flanges and piping
Inside diameter × cross section
354.96 × 6.99 mm
13.975″ × 0.275″ ·
outside diameter 368.94 mm (14.525″)
Dimensions
| Dimension | Inches | Millimetres |
|---|---|---|
| Inside diameter (ID) | 13.975″ | 354.96 mm |
| Cross section (CS) | 0.275″ | 6.99 mm |
| Outside diameter (OD) | 14.525″ | 368.94 mm |
Outside diameter is not measured, it is derived: OD = ID + 2 × CS.
If your measured OD disagrees with this, trust the ID and cross section — measuring
across the outside of a flexible ring is the least reliable of the three.
If you measured a used one
A ring pulled out of service will measure smaller than 354.96 mm, because compression set is permanent. If your measurement came in a little under this and the cross section roughly matches, -461 is very likely still the correct part. Ordering the size your worn ring measures is how the same failure repeats. More on this →
Nearby sizes in the 400 series
These share the same 1/4" cross section, so if the thickness is right but the diameter is off, your ring is probably one of these.
| Dash | ID (mm) | ID (in) | OD (mm) |
|---|---|---|---|
| -460 | 342.26 | 13.475″ | 356.24 |
| -462 | 367.66 | 14.475″ | 381.63 |
| -459 | 329.56 | 12.975″ | 343.53 |
| -463 | 380.36 | 14.975″ | 394.33 |