8-115 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-115 black Buna-N (Nitrile) 90 Shore A built to an inside diameter of 0.674 in (17.12 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.88 in (22.35 mm), catalogued under part number HB90115. It 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, greases and lubricants, and hydraulic fluids. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ketones or ozone and direct sunlight.

Maintenance and OEM teams specify it across automotive, hydraulic and pneumatic systems, and general industrial maintenance.

Reference part number HB90115 when ordering; the item is sold individually. Unit weight is approximately 0.222 g. Review your operating media and conditions against this specification before installation.