8-133 BLACK BUNA 90D BACK-UP RING

Part number HB90133 is an AS568-133 black Buna-N (Nitrile) 90 Shore A Back-Up Ring built to an inside diameter of 1.799 in (45.69 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.005 in (50.93 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

As a material, Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists hydraulic fluids, petroleum-based oils, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or strong acids are present.

Common environments for this compound include hydraulic and pneumatic systems, general industrial maintenance, and fluid power.

Reference part number HB90133 when ordering; the item is sold individually. Unit weight is approximately 0.536 g. Review your operating media and conditions against this specification before installation.