568-231 BLACK HNBR HSN70 O-Ring

Ordered as HSN70231, this is an AS568-231 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring with an inside diameter of 2.609 in (66.27 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.887 in (73.33 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

HNBR (Hydrogenated Nitrile) is widely chosen for strong resistance to rapid gas decompression, improved ozone and weathering resistance over standard nitrile. Expect good resistance to sour gas and amine inhibitors, ozone and weathering, and heat and oxidation. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). Applications involving ketones or strong oxidizing acids call for a different compound.

It sees regular use in engine timing systems, oilfield and downhole equipment, and heavy-duty powertrain.

Reference part number HSN70231 when ordering; the item is sold individually. Unit weight is approximately 2.569 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.