HSN (HNBR) 80 568-390

Ordered as HSN80390, this is an AS568-390 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring measuring an inside diameter of 20.953 in (532.21 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 21.373 in (542.87 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Expect good resistance to sour gas and amine inhibitors, ozone and weathering, and petroleum oils and fuels. HNBR (Hydrogenated Nitrile) is known for the oil resistance of nitrile with substantially better heat capability, excellent abrasion and tear strength. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service. Applications involving esters or chlorinated hydrocarbons call for a different compound.

Common environments for this compound include oilfield and downhole equipment, automotive air conditioning, and engine timing systems.

Reference part number HSN80390 when ordering; the item is sold individually. Nominal inside diameter is listed as 21 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.