8.4MM CS X 279.5MM ID BLACK BUNA 70D

APG stocks the H8.4X279.5, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 279.5 mm (11.004 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 296.3 mm (11.67 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Source specification: Metric O-RING, JIS P280.

As a material, Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. It resists water, greases and lubricants, and many alcohols. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to automotive brake fluid or polar solvents will shorten service life.

You will find this material specified across general industrial maintenance, automotive, and fluid power.

Stocked as H8.4X279.5 and sold individually. Unit weight is approximately 61.26 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.