568-389 HSN90 DURO ORINGS

Ordered as HSN90389, this is an AS568-389 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 19.953 in (506.81 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 20.373 in (517.47 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

HNBR (Hydrogenated Nitrile) is specified here for oil resistance of nitrile with substantially better heat capability, long service life in refrigerant and oilfield duty. Expect good resistance to sour gas and amine inhibitors, ozone and weathering, and modern refrigerants. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C).

You will find this material specified across heavy-duty powertrain, automotive air conditioning, and engine timing systems.

Stocked as HSN90389 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.