HSN (HNBR) 80 568-373

This o-ring is supplied in AS568-373 green HNBR (Hydrogenated Nitrile) 80 Shore A supplied with an inside diameter of 8.975 in (227.97 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 9.395 in (238.63 mm), catalogued under part number HSN80373. It compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to sour gas and amine inhibitors, heat and oxidation, and petroleum oils and fuels. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is specified for improved ozone and weathering resistance over standard nitrile, excellent abrasion and tear strength. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C).

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

Order part number HSN80373, sold individually. Nominal inside diameter is listed as 9 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.