568-227 BLACK HNBR HSN70 O-Ring

Part number HSN70227 is an AS568-227 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 2.109 in (53.57 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.387 in (60.63 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

HNBR (Hydrogenated Nitrile) is specified here for improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. The compound resists modern refrigerants, petroleum oils and fuels, and sour gas and amine inhibitors. 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 commercial refrigeration, heavy-duty powertrain, and automotive air conditioning.

Reference part number HSN70227 when ordering; the item is sold individually. Unit weight is approximately 2.0837 g and nominal inside diameter is listed as 2 1/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. 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.