8-114 BLACK BUNA 90D BACK-UP RING

APG stocks the HB90114, an AS568-114 black Buna-N (Nitrile) 90 Shore A Back-Up Ring measuring an inside diameter of 0.612 in (15.54 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.818 in (20.78 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. The compound resists water, many alcohols, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

You will find this material specified across construction equipment, fluid power, and general industrial maintenance.

Order part number HB90114, sold individually. Unit weight is approximately 0.207 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.