HSN (HNBR) 80 568-278

The HSN80278 is an AS568-278 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring measuring an inside diameter of 11.984 in (304.39 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 12.262 in (311.45 mm). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

HNBR (Hydrogenated Nitrile) is specified for excellent abrasion and tear strength, long service life in refrigerant and oilfield duty. The compound resists heat and oxidation, ozone and weathering, and petroleum oils and fuels. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C).

Common environments for this compound include heavy-duty powertrain, engine timing systems, and commercial refrigeration.

HSN80278 ships individually. Nominal inside diameter is listed as 12 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.