568-237 BLACK HNBR HSN70 O-Ring

Ordered as HSN70237, this is an AS568-237 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 3.359 in (85.32 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.637 in (92.38 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, HNBR (Hydrogenated Nitrile) is valued for strong resistance to rapid gas decompression and the oil resistance of nitrile with substantially better heat capability. The material holds up against ozone and weathering, modern refrigerants, and sour gas and amine inhibitors. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Exposure to ketones or chlorinated hydrocarbons will shorten service life.

You will find this material specified across engine timing systems, commercial refrigeration, and heavy-duty powertrain.

This item is sold individually under part number HSN70237. Unit weight is approximately 0.0033 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.