HSN (HNBR) 80 568-359

HSN80359 is an AS568-359 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring with an inside diameter of 5.725 in (145.42 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 6.145 in (156.08 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

HNBR (Hydrogenated Nitrile) offers strong resistance to rapid gas decompression, improved ozone and weathering resistance over standard nitrile. This material stands up to modern refrigerants, petroleum oils and fuels, and sour gas and amine inhibitors. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). Exposure to chlorinated hydrocarbons or esters will shorten service life.

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

HSN80359 ships individually. Unit weight is approximately 14.054 g. 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.