8-035 BLACK BUNA 90D BACK-UP RING

Part number HB90035 is an AS568-035 black Buna-N (Nitrile) 90 Shore A Back-Up Ring built to an inside diameter of 2.239 in (56.87 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 2.379 in (60.43 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

The material holds up against water, many alcohols, and greases and lubricants. Buna-N (Nitrile) is valued for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Typical settings include fluid power, construction equipment, and general industrial maintenance.

HB90035 ships individually. Unit weight is approximately 0.402 g and nominal inside diameter is listed as 2 1/4 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.