-239 BLACK BUNA 90D O-RING

The H90239 is an AS568-239 black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The compound resists petroleum-based oils, many alcohols, and propane and butane. Buna-N (Nitrile) is specified for strong abrasion and tear resistance, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or polar solvents are present.

You will find this material specified across construction equipment, hydraulic and pneumatic systems, and automotive.

This item is sold individually under part number H90239. Unit weight is approximately 4.1379 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.