568-259 BLACK HNBR HSN70 O-Ring

The HSN70259 is an AS568-259 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 6.234 in (158.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.512 in (165.4 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, HNBR (Hydrogenated Nitrile) offers excellent abrasion and tear strength, long service life in refrigerant and oilfield duty. It resists heat and oxidation, modern refrigerants, and ozone and weathering. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with ketones or esters.

You will find this material specified across automotive air conditioning, heavy-duty powertrain, and engine timing systems.

Reference part number HSN70259 when ordering; the item is sold individually. Unit weight is approximately 5.9138 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.