-431 BLACK BUNA 90D O-RING

The H90431 is an AS568-431 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 5.225 in (132.72 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.775 in (146.69 mm). This o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, strong abrasion and tear resistance. This material stands up to greases and lubricants, hydraulic fluids, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or ketones.

You will find this material specified across fluid power, agricultural equipment, and hydraulic and pneumatic systems.

Stocked as H90431 and sold individually. Unit weight is approximately 21.95 g. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.