**568-252 BLACK HNBR HSN70 O-Ring

Ordered as HSN70252, this is an AS568-252 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 5.234 in (132.94 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.512 in (140 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

HNBR (Hydrogenated Nitrile) offers improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. Expect good resistance to petroleum oils and fuels, modern refrigerants, and ozone and weathering. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where esters or chlorinated hydrocarbons are present.

You will find this material specified across oilfield and downhole equipment, engine timing systems, and heavy-duty powertrain.

Stocked as HSN70252 and 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.