568-258 BLACK HNBR HSN70 O-Ring

This o-ring is supplied in AS568-258 black HNBR (Hydrogenated Nitrile) 70 Shore A measuring an inside diameter of 5.984 in (151.99 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.262 in (159.05 mm), catalogued under part number HSN70258. It delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to heat and oxidation, modern refrigerants, and sour gas and amine inhibitors. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is valued for long service life in refrigerant and oilfield duty, strong resistance to rapid gas decompression. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). It is not the right choice where esters or ketones are present.

Common environments for this compound include engine timing systems, automotive air conditioning, and heavy-duty powertrain.

Order part number HSN70258, sold individually. Unit weight is approximately 5.7131 g and nominal inside diameter is listed as 6 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.