568-235 HSN90 DURO ORINGS

This o-ring is supplied in AS568-235 green HNBR (Hydrogenated Nitrile) 90 Shore A measuring an inside diameter of 3.109 in (78.97 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.387 in (86.03 mm), catalogued under part number HSN90235. It delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against sour gas and amine inhibitors, modern refrigerants, and ozone and weathering. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is known for excellent abrasion and tear strength, strong resistance to rapid gas decompression. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). It should not be specified for service in esters or chlorinated hydrocarbons.

Maintenance and OEM teams specify it across heavy-duty powertrain, commercial refrigeration, and engine timing systems.

Stocked as HSN90235 and sold individually. Unit weight is approximately 3.3444 g and nominal inside diameter is listed as 3 1/8 inch. Review your operating media and conditions against this specification before installation.