568-336 HSN90 DURO ORINGS

The HSN90336 is an AS568-336 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 2.85 in (72.39 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.27 in (83.06 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, HNBR (Hydrogenated Nitrile) is known for strong resistance to rapid gas decompression, improved ozone and weathering resistance over standard nitrile. The material holds up against petroleum oils and fuels, modern refrigerants, and heat and oxidation. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C).

Maintenance and OEM teams specify it across engine timing systems, commercial refrigeration, and automotive air conditioning.

Order part number HSN90336, sold individually. Unit weight is approximately 7.2041 g and nominal inside diameter is listed as 2 7/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.