5MM CS X 85MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 85 mm (3.346 in), a cross section of 5 mm (0.197 in), and an outside diameter of 95 mm (3.74 in), catalogued under part number H5X85. It creates a positive seal at flange, piston and rod interfaces without added hardware.

The material holds up against greases and lubricants, hydraulic fluids, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, automotive, and agricultural equipment.

Reference part number H5X85 when ordering; the item is sold individually. Unit weight is approximately 6.8637 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.