HSN (HNBR) 80 568-904

Ordered as HSN80904, this is an AS568-904 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 0.351 in (8.92 mm), a cross section of 0.072 in (1.83 mm), and an outside diameter of 0.495 in (12.57 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The compound resists petroleum oils and fuels, ozone and weathering, and sour gas and amine inhibitors. HNBR (Hydrogenated Nitrile) is widely chosen for improved ozone and weathering resistance over standard nitrile, long service life in refrigerant and oilfield duty. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where chlorinated hydrocarbons or strong oxidizing acids are present.

Maintenance and OEM teams specify it across commercial refrigeration, heavy-duty powertrain, and oilfield and downhole equipment.

Order part number HSN80904, sold individually. Nominal inside diameter is listed as 1/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.