568-422 HSN90 DURO ORINGS

Ordered as HSN90422, this is an AS568-422 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 4.1 in (104.14 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.65 in (118.11 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The material holds up against modern refrigerants, heat and oxidation, and petroleum oils and fuels. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) offers strong resistance to rapid gas decompression and the oil resistance of nitrile with substantially better heat capability. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service.

Maintenance and OEM teams specify it across oilfield and downhole equipment, engine timing systems, and automotive air conditioning.

Reference part number HSN90422 when ordering; the item is sold individually. Nominal inside diameter is listed as 4 1/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.