4MM CS X 57MM ID BLACK BUNA 70D

Part number H4X57 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 57 mm (2.244 in), a cross section of 4 mm (0.157 in), and an outside diameter of 65 mm (2.56 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. This material stands up to hydraulic fluids, greases and lubricants, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound.

It sees regular use in agricultural equipment, hydraulic and pneumatic systems, and general industrial maintenance.

This item is sold individually under part number H4X57. Unit weight is approximately 2.92 g. Check the compound against your process media, pressure and temperature before committing to a design.