HSN (HNBR) 80 568-231

Part number HSN80231 is an AS568-231 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 2.609 in (66.27 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.887 in (73.33 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The compound resists ozone and weathering, heat and oxidation, and petroleum oils and fuels. HNBR (Hydrogenated Nitrile) is valued for improved ozone and weathering resistance over standard nitrile, the oil resistance of nitrile with substantially better heat capability. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Applications involving strong oxidizing acids or chlorinated hydrocarbons call for a different compound.

Common environments for this compound include commercial refrigeration, oilfield and downhole equipment, and heavy-duty powertrain.

This item is sold individually under part number HSN80231. Unit weight is approximately 2.9321 g and nominal inside diameter is listed as 2 5/8 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.