Home › AS568-144
AS568-144 O-Ring Size
100 series · 3/32" cross section · Hydraulics, pumps, valves
Inside diameter × cross section
63.17 × 2.62 mm
2.487″ × 0.103″ ·
outside diameter 68.4 mm (2.693″)
Dimensions
| Dimension | Inches | Millimetres |
|---|---|---|
| Inside diameter (ID) | 2.487″ | 63.17 mm |
| Cross section (CS) | 0.103″ | 2.62 mm |
| Outside diameter (OD) | 2.693″ | 68.4 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 63.17 mm, because compression set is permanent. If your measurement came in a little under this and the cross section roughly matches, -144 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 100 series
These share the same 3/32" 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) |
|---|---|---|---|
| -143 | 61.59 | 2.425″ | 66.83 |
| -145 | 64.77 | 2.55″ | 70.0 |
| -142 | 59.99 | 2.362″ | 65.23 |
| -146 | 66.34 | 2.612″ | 71.58 |