Home › AS568-116
AS568-116 O-Ring Size
100 series · 3/32" cross section · Hydraulics, pumps, valves
Inside diameter × cross section
18.72 × 2.62 mm
0.737″ × 0.103″ ·
outside diameter 23.95 mm (0.943″)
Dimensions
| Dimension | Inches | Millimetres |
|---|---|---|
| Inside diameter (ID) | 0.737″ | 18.72 mm |
| Cross section (CS) | 0.103″ | 2.62 mm |
| Outside diameter (OD) | 0.943″ | 23.95 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 18.72 mm, because compression set is permanent. If your measurement came in a little under this and the cross section roughly matches, -116 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) |
|---|---|---|---|
| -117 | 20.29 | 0.799″ | 25.53 |
| -115 | 17.12 | 0.674″ | 22.35 |
| -114 | 15.54 | 0.612″ | 20.78 |
| -118 | 21.89 | 0.862″ | 27.13 |