3.5MM CS X 290MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 290 mm (11.417 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 297 mm (11.69 in), catalogued under part number H3.5X290. It remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to hydraulic fluids, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

You will find this material specified across fluid power, agricultural equipment, and hydraulic and pneumatic systems.

Reference part number H3.5X290 when ordering; the item is sold individually. Review your operating media and conditions against this specification before installation.