568-323 HSN90 DURO ORINGS

Ordered as HSN90323, this is an AS568-323 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring measuring an inside diameter of 1.287 in (32.69 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.707 in (43.36 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

HNBR (Hydrogenated Nitrile) delivers improved ozone and weathering resistance over standard nitrile, long service life in refrigerant and oilfield duty. The compound resists heat and oxidation, petroleum oils and fuels, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with strong oxidizing acids or chlorinated hydrocarbons.

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

Stocked as HSN90323 and sold individually. Unit weight is approximately 3.525 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.