8-352 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-352 black Buna-N (Nitrile) 90 Shore A supplied with an inside diameter of 4.85 in (123.19 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.27 in (133.86 mm), catalogued under part number HB90352. It extends o-ring service life by supporting the seal against extrusion under high pressure.

Expect good resistance to many alcohols, petroleum-based oils, and hydraulic fluids. Buna-N (Nitrile) offers reliable performance in both static and dynamic service, 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 ketones or ozone and direct sunlight.

Typical settings include general industrial maintenance, hydraulic and pneumatic systems, and automotive.

This item is sold individually under part number HB90352. Unit weight is approximately 4.3183 g and nominal inside diameter is listed as 4 7/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.