8-314 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-314 black Buna-N (Nitrile) 90 Shore A supplied with an inside diameter of 0.725 in (18.42 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.145 in (29.08 mm), catalogued under part number HB90314. It bridges the extrusion gap so the primary seal holds its shape under load.

As a material, Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. This material stands up to water, many alcohols, and greases and lubricants. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or ketones.

It sees regular use in agricultural equipment, automotive, and hydraulic and pneumatic systems.

This item is sold individually under part number HB90314. Unit weight is approximately 0.865 g and nominal inside diameter is listed as 3/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.