-451 BLACK BUNA 90D O-RING

H90451 is an AS568-451 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 10.975 in (278.77 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 11.525 in (292.74 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The material holds up against many alcohols, petroleum-based oils, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ketones or automotive brake fluid.

You will find this material specified across construction equipment, general industrial maintenance, and automotive.

Reference part number H90451 when ordering; the item is sold individually. Unit weight is approximately 45.01 g and nominal inside diameter is listed as 11 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.