8-202 BLACK BUNA 90D BACK-UP RING

Part number HB90202 is an AS568-202 black Buna-N (Nitrile) 90 Shore A Back-Up Ring supplied with an inside diameter of 0.234 in (5.94 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.512 in (13 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

Expect good resistance to propane and butane, greases and lubricants, and many alcohols. Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

Typical settings include agricultural equipment, construction equipment, and hydraulic and pneumatic systems.

This item is sold individually under part number HB90202. Unit weight is approximately 0.141 g and nominal inside diameter is listed as 1/4 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.