HSN (HNBR) 80 568-331

The HSN80331 is an AS568-331 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring with an inside diameter of 2.225 in (56.52 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.645 in (67.18 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to heat and oxidation, ozone and weathering, and petroleum oils and fuels. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) offers strong resistance to rapid gas decompression, excellent abrasion and tear strength. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Exposure to ketones or strong oxidizing acids will shorten service life.

Typical settings include commercial refrigeration, heavy-duty powertrain, and engine timing systems.

Reference part number HSN80331 when ordering; the item is sold individually. Unit weight is approximately 0.0055 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.