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AS568-117 O-Ring Size
100 series · 3/32" cross section · Hydraulics, pumps, valves
Inside diameter × cross section
20.29 × 2.62 mm
0.799″ × 0.103″ ·
outside diameter 25.53 mm (1.005″)
Dimensions
| Dimension | Inches | Millimetres |
|---|---|---|
| Inside diameter (ID) | 0.799″ | 20.29 mm |
| Cross section (CS) | 0.103″ | 2.62 mm |
| Outside diameter (OD) | 1.005″ | 25.53 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 20.29 mm, because compression set is permanent. If your measurement came in a little under this and the cross section roughly matches, -117 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) |
|---|---|---|---|
| -116 | 18.72 | 0.737″ | 23.95 |
| -118 | 21.89 | 0.862″ | 27.13 |
| -115 | 17.12 | 0.674″ | 22.35 |
| -119 | 23.47 | 0.924″ | 28.7 |