HSN (HNBR) 80 568-020

Part number HSN80020 is an AS568-020 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring measuring an inside diameter of 0.864 in (21.95 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.004 in (25.5 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against heat and oxidation, petroleum oils and fuels, and modern refrigerants. HNBR (Hydrogenated Nitrile) is valued for excellent abrasion and tear strength, improved ozone and weathering resistance over standard nitrile. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service. It should not be specified for service in ketones or strong oxidizing acids.

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

Reference part number HSN80020 when ordering; the item is sold individually. Nominal inside diameter is listed as 7/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.