8-150 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-150 black Buna-N (Nitrile) 90 Shore A with an inside diameter of 2.862 in (72.69 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.068 in (77.93 mm), catalogued under part number HB90150. It extends o-ring service life by supporting the seal against extrusion under high pressure.

The material holds up against water, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or ketones.

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

This item is sold individually under part number HB90150. Unit weight is approximately 0.576 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.