HSN (HNBR) 80 568-218

Part number HSN80218 is an AS568-218 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring measuring an inside diameter of 1.234 in (31.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.512 in (38.4 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists ozone and weathering, sour gas and amine inhibitors, and modern refrigerants. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is known for long service life in refrigerant and oilfield duty, strong resistance to rapid gas decompression. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C).

You will find this material specified across engine timing systems, automotive air conditioning, and oilfield and downhole equipment.

Stocked as HSN80218 and sold individually. Unit weight is approximately 1.425 g and nominal inside diameter is listed as 1 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.