HSN (HNBR) 80 568-357

Ordered as HSN80357, this is an AS568-357 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 5.475 in (139.07 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.895 in (149.73 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The compound resists modern refrigerants, sour gas and amine inhibitors, and petroleum oils and fuels. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is widely chosen for the oil resistance of nitrile with substantially better heat capability, improved ozone and weathering resistance over standard nitrile. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with esters or ketones.

Typical settings include heavy-duty powertrain, oilfield and downhole equipment, and engine timing systems.

Stocked as HSN80357 and sold individually. Unit weight is approximately 13.336 g and nominal inside diameter is listed as 5 1/2 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.