HSN (HNBR) 80 568-143

Part number HSN80143 is an AS568-143 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 2.425 in (61.6 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.631 in (66.83 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to petroleum oils and fuels, heat and oxidation, and modern refrigerants. HNBR (Hydrogenated Nitrile) is known for excellent abrasion and tear strength, long service life in refrigerant and oilfield duty. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Exposure to strong oxidizing acids or esters will shorten service life.

It sees regular use in oilfield and downhole equipment, engine timing systems, and heavy-duty powertrain.

Order part number HSN80143, sold individually. Nominal inside diameter is listed as 2 7/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.