HSN (HNBR) 80 568-920

The HSN80920 is an AS568-920 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring measuring an inside diameter of 1.475 in (37.47 mm), a cross section of 0.118 in (3 mm), and an outside diameter of 1.711 in (43.46 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

HNBR (Hydrogenated Nitrile) is valued for the oil resistance of nitrile with substantially better heat capability and strong resistance to rapid gas decompression. The compound resists ozone and weathering, modern refrigerants, and petroleum oils and fuels. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where chlorinated hydrocarbons or strong oxidizing acids are present.

Maintenance and OEM teams specify it across heavy-duty powertrain, commercial refrigeration, and oilfield and downhole equipment.

Order part number HSN80920, sold individually. Nominal inside diameter is listed as 1 1/4 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.