All stocked HNBR AS568 o-rings have three measurement types. First, a nominal inch reference, then actual inch sizes, and finally the metric size displayed in millimeters. HNBR o-rings are stocked and cataloged by their AS568 number. This number references the Aerospace Standard 568 (AS568) which was published by the SAE (Society of Automotive Engineers). Each o-ring is assigned a dash number which correlates directly to an exact o-ring size. You may view a complete chart of these o-ring sizes.
Vegetable and animal fats and oils
HFA, HFB and HFC hydraulic fluids
Dilute acids, bases and salt solutions at moderate temperatures
Water up to 149°C (300°F)
Ozone, aging and weathering?
Not compatible with:
Polar solvents (ketones, esters and ethers)