568-212 HSN90 DURO ORINGS

HSN90212 is an AS568-212 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 0.859 in (21.82 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.137 in (28.88 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

HNBR (Hydrogenated Nitrile) is known for strong resistance to rapid gas decompression, long service life in refrigerant and oilfield duty. The compound resists sour gas and amine inhibitors, heat and oxidation, and modern refrigerants. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). Applications involving chlorinated hydrocarbons or ketones call for a different compound.

Common environments for this compound include oilfield and downhole equipment, heavy-duty powertrain, and automotive air conditioning.

HSN90212 ships individually. Unit weight is approximately 1.025 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.