8-112 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-112 black Buna-N (Nitrile) 90 Shore A measuring an inside diameter of 0.487 in (12.37 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.693 in (17.6 mm), catalogued under part number HB90112. It extends o-ring service life by supporting the seal against extrusion under high pressure.

As a material, Buna-N (Nitrile) is valued for low compression set under sustained load, reliable performance in both static and dynamic service. Expect good resistance to many alcohols, propane and butane, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or ozone and direct sunlight.

You will find this material specified across hydraulic and pneumatic systems, agricultural equipment, and automotive.

This item is sold individually under part number HB90112. Unit weight is approximately 0.17 g and nominal inside diameter is listed as 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design.