568-350 HSN90 DURO ORINGS

Part number HSN90350 is an AS568-350 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring built to an inside diameter of 4.6 in (116.84 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.02 in (127.51 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

HNBR (Hydrogenated Nitrile) is specified here for excellent abrasion and tear strength, strong resistance to rapid gas decompression. This material stands up to modern refrigerants, heat and oxidation, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Applications involving esters or chlorinated hydrocarbons call for a different compound.

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

Order part number HSN90350, sold individually. Unit weight is approximately 11.184 g and nominal inside diameter is listed as 4 5/8 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.