568-337 HSN90 DURO ORINGS

APG stocks the HSN90337, an AS568-337 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 2.975 in (75.57 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.395 in (86.23 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The compound resists sour gas and amine inhibitors, modern refrigerants, and heat and oxidation. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) delivers improved ozone and weathering resistance over standard nitrile, long service life in refrigerant and oilfield duty. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). Applications involving chlorinated hydrocarbons or esters call for a different compound.

Typical settings include oilfield and downhole equipment, commercial refrigeration, and engine timing systems.

Reference part number HSN90337 when ordering; the item is sold individually. Unit weight is approximately 7.4445 g. Review your operating media and conditions against this specification before installation. 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.