-331 BLACK BUNA 90D O-RING

Ordered as H90331, this is an AS568-331 black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 2.225 in (56.52 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.645 in (67.18 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified here for low compression set under sustained load, reliable performance in both static and dynamic service. This material stands up to hydraulic fluids, many alcohols, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ketones or strong acids will shorten service life.

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

Reference part number H90331 when ordering; the item is sold individually. Unit weight is approximately 5.584 g. 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.