8-148 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-148 black Buna-N (Nitrile) 90 Shore A built to an inside diameter of 2.737 in (69.52 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.943 in (74.75 mm), catalogued under part number HB90148. It allows a standard o-ring to operate at higher pressures than it could unsupported.

Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. This material stands up to 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 polar solvents or automotive brake fluid are present.

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

This item is sold individually under part number HB90148. Unit weight is approximately 0.8141 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.