568-904 HSN90 DURO ORINGS

Part number HSN90904 is an AS568-904 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 0.351 in (8.92 mm), a cross section of 0.072 in (1.83 mm), and an outside diameter of 0.495 in (12.57 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to ozone and weathering, petroleum oils and fuels, and modern refrigerants. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) delivers the oil resistance of nitrile with substantially better heat capability and strong resistance to rapid gas decompression. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service. It is not the right choice where strong oxidizing acids or esters are present.

You will find this material specified across commercial refrigeration, oilfield and downhole equipment, and heavy-duty powertrain.

HSN90904 ships individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.