8-315 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-315 black Buna-N (Nitrile) 90 Shore A measuring an inside diameter of 0.787 in (19.99 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.207 in (30.66 mm), catalogued under part number HB90315. It extends o-ring service life by supporting the seal against extrusion under high pressure.

The compound resists greases and lubricants, water, and hydraulic fluids. Buna-N (Nitrile) offers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or polar solvents.

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

Order part number HB90315, sold individually. Unit weight is approximately 0.858 g. Check the compound against your process media, pressure and temperature before committing to a design.