2.5MM CS X 40MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 40 mm (1.575 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 45 mm (1.77 in), catalogued under part number H2.5X40. It remains the most cost-effective sealing element available for pressurized assemblies.

The compound resists hydraulic fluids, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or ketones call for a different compound.

It sees regular use in agricultural equipment, construction equipment, and hydraulic and pneumatic systems.

Stocked as H2.5X40 and sold individually. Unit weight is approximately 0.8 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.