8-036 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-036 black Buna-N (Nitrile) 90 Shore A built to an inside diameter of 2.364 in (60.05 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 2.504 in (63.6 mm), catalogued under part number HB90036. It allows a standard o-ring to operate at higher pressures than it could unsupported.

As a material, Buna-N (Nitrile) offers low compression set under sustained load, reliable performance in both static and dynamic service. The compound resists many alcohols, propane and butane, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or automotive brake fluid.

It sees regular use in agricultural equipment, construction equipment, and general industrial maintenance.

Order part number HB90036, sold individually. Unit weight is approximately 0.425 g and nominal inside diameter is listed as 2 3/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.