8-468 BLACK BUNA 90D BACK-UP RING

HB90468 is an AS568-468 black Buna-N (Nitrile) 90 Shore A Back-Up Ring with an inside diameter of 19.455 in (494.16 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 20.005 in (508.13 mm). In service, this back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

It resists water, greases and lubricants, and propane and butane. Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include automotive, agricultural equipment, and hydraulic and pneumatic systems.

Stocked as HB90468 and sold individually. Unit weight is approximately 33.514 g. 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.