8-120 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-120 black Buna-N (Nitrile) 90 Shore A measuring an inside diameter of 0.987 in (25.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.193 in (30.3 mm), catalogued under part number HB90120. It extends o-ring service life by supporting the seal against extrusion under high pressure.

Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The material holds up against water, hydraulic fluids, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include agricultural equipment, general industrial maintenance, and construction equipment.

HB90120 ships individually. Unit weight is approximately 0.309 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.