568-203 HSN90 DURO ORINGS

Part number HSN90203 is an AS568-203 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 0.296 in (7.52 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.574 in (14.58 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The compound resists heat and oxidation, modern refrigerants, and sour gas and amine inhibitors. HNBR (Hydrogenated Nitrile) is valued for strong resistance to rapid gas decompression, improved ozone and weathering resistance over standard nitrile. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). Applications involving chlorinated hydrocarbons or ketones call for a different compound.

Maintenance and OEM teams specify it across heavy-duty powertrain, commercial refrigeration, and engine timing systems.

Order part number HSN90203, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.