568-266 BLACK HNBR HSN70 O-Ring

APG stocks the HSN70266, an AS568-266 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring measuring an inside diameter of 7.984 in (202.79 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 8.262 in (209.85 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

HNBR (Hydrogenated Nitrile) is specified here for excellent abrasion and tear strength, oil resistance of nitrile with substantially better heat capability. The compound resists ozone and weathering, heat and oxidation, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where chlorinated hydrocarbons or ketones are present.

Maintenance and OEM teams specify it across oilfield and downhole equipment, automotive air conditioning, and engine timing systems.

Reference part number HSN70266 when ordering; the item is sold individually. Unit weight is approximately 7.422 g and nominal inside diameter is listed as 8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.