8.4MM CS X 399.5MM ID BLACK BUNA 70D

H8.4X399.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 399.5 mm (15.728 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 416.3 mm (16.39 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. This item is further identified as Metric O-RING, JIS P400.

The material holds up against many alcohols, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Typical settings include general industrial maintenance, hydraulic and pneumatic systems, and automotive.

Order part number H8.4X399.5, sold individually. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.