HSN (HNBR) 80 568-468

APG stocks the HSN80468, an AS568-468 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring measuring an inside diameter of 19.455 in (494.16 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 20.005 in (508.13 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

HNBR (Hydrogenated Nitrile) delivers long service life in refrigerant and oilfield duty, improved ozone and weathering resistance over standard nitrile. The material holds up against modern refrigerants, heat and oxidation, and petroleum oils and fuels. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with chlorinated hydrocarbons or ketones.

Maintenance and OEM teams specify it across heavy-duty powertrain, commercial refrigeration, and automotive air conditioning.

This item is sold individually under part number HSN80468. Nominal inside diameter is listed as 19 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.