HSN (HNBR) 80 568-466

HSN80466 is an AS568-466 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 18.455 in (468.76 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 19.005 in (482.73 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

HNBR (Hydrogenated Nitrile) is specified here for strong resistance to rapid gas decompression and oil resistance of nitrile with substantially better heat capability. It resists modern refrigerants, heat and oxidation, and ozone and weathering. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). It should not be specified for service in esters or ketones.

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

Stocked as HSN80466 and sold individually. Nominal inside diameter is listed as 18 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.