568-321 HSN90 DURO ORINGS

HSN90321 is an AS568-321 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring built to an inside diameter of 1.162 in (29.51 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.582 in (40.18 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.

It resists sour gas and amine inhibitors, petroleum oils and fuels, and ozone and weathering. HNBR (Hydrogenated Nitrile) is widely chosen for improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where ketones or strong oxidizing acids are present.

Maintenance and OEM teams specify it across oilfield and downhole equipment, automotive air conditioning, and heavy-duty powertrain.

Stocked as HSN90321 and sold individually. Check the compound against your process media, pressure and temperature before committing to a design.