*568-210 BLACK HNBR HSN70 O-Ring

HSN70210 is an AS568-210 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring measuring an inside diameter of 0.734 in (18.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.012 in (25.7 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

HNBR (Hydrogenated Nitrile) is widely chosen for improved ozone and weathering resistance over standard nitrile, long service life in refrigerant and oilfield duty. This material stands up to ozone and weathering, heat and oxidation, and modern refrigerants. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with esters or strong oxidizing acids.

You will find this material specified across automotive air conditioning, engine timing systems, and commercial refrigeration.

HSN70210 ships individually. Nominal inside diameter is listed as 3/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.