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AS568-043 O-Ring Size
000 series · 1/16" cross section · Pneumatics, instrumentation, small static seals
Inside diameter × cross section
88.62 × 1.78 mm
3.489″ × 0.07″ ·
outside diameter 92.18 mm (3.629″)
Dimensions
| Dimension | Inches | Millimetres |
|---|---|---|
| Inside diameter (ID) | 3.489″ | 88.62 mm |
| Cross section (CS) | 0.07″ | 1.78 mm |
| Outside diameter (OD) | 3.629″ | 92.18 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 88.62 mm, because compression set is permanent. If your measurement came in a little under this and the cross section roughly matches, -043 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 000 series
These share the same 1/16" 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) |
|---|---|---|---|
| -042 | 82.27 | 3.239″ | 85.83 |
| -044 | 94.97 | 3.739″ | 98.53 |
| -041 | 75.92 | 2.989″ | 79.48 |
| -045 | 101.32 | 3.989″ | 104.88 |