8.4MM CS X 164.5MM ID BLACK BUNA 70D

Part number H8.4X164.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 164.5 mm (6.476 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 181.3 mm (7.14 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Additional detail on this item: Metric O-RING, JIS P165.

This material stands up to petroleum-based oils, water, and greases and lubricants. Buna-N (Nitrile) offers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or strong acids.

Maintenance and OEM teams specify it across automotive, construction equipment, and fluid power.

Stocked as H8.4X164.5 and sold individually. Unit weight is approximately 36.603 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.