568-435 HSN90 DURO ORINGS

Ordered as HSN90435, this is an AS568-435 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 5.725 in (145.42 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.275 in (159.39 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

HNBR (Hydrogenated Nitrile) is known for strong resistance to rapid gas decompression and the oil resistance of nitrile with substantially better heat capability. This material stands up to petroleum oils and fuels, ozone and weathering, and modern refrigerants. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). Applications involving strong oxidizing acids or chlorinated hydrocarbons call for a different compound.

It sees regular use in heavy-duty powertrain, automotive air conditioning, and oilfield and downhole equipment.

Order part number HSN90435, sold individually. Nominal inside diameter is listed as 5 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.