8.4MM CS X 359.5MM ID BLACK BUNA 70D

The H8.4X359.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 359.5 mm (14.154 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 376.3 mm (14.81 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. Supplementary detail from the product record: Metric O-RING, JIS P360.

Expect good resistance to water, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to automotive brake fluid or polar solvents will shorten service life.

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

Stocked as H8.4X359.5 and sold individually. Unit weight is approximately 77.57 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.