HSN (HNBR) 80 568-389

HSN80389 is an AS568-389 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring measuring an inside diameter of 19.953 in (506.81 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 20.373 in (517.47 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against heat and oxidation, petroleum oils and fuels, and ozone and weathering. HNBR (Hydrogenated Nitrile) delivers improved ozone and weathering resistance over standard nitrile, excellent abrasion and tear strength. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C).

Maintenance and OEM teams specify it across heavy-duty powertrain, automotive air conditioning, and oilfield and downhole equipment.

Order part number HSN80389, sold individually. Nominal inside diameter is listed as 20 inch. Review your operating media and conditions against this specification before installation.