HSN (HNBR) 80 568-355

This o-ring is supplied in AS568-355 green HNBR (Hydrogenated Nitrile) 80 Shore A measuring an inside diameter of 5.225 in (132.72 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.645 in (143.38 mm), catalogued under part number HSN80355. It provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to ozone and weathering, modern refrigerants, and heat and oxidation. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) delivers strong resistance to rapid gas decompression, 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. Applications involving chlorinated hydrocarbons or strong oxidizing acids call for a different compound.

Maintenance and OEM teams specify it across oilfield and downhole equipment, engine timing systems, and heavy-duty powertrain.

This item is sold individually under part number HSN80355. Unit weight is approximately 13.013 g. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.