4MM CS X 70MM ID BLACK BUNA 70D

Part number H4X70 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 70 mm (2.756 in), a cross section of 4 mm (0.157 in), and an outside diameter of 78 mm (3.07 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against hydraulic fluids, propane and butane, and petroleum-based oils. 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). It is not the right choice where ozone and direct sunlight or ketones are present.

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

This item is sold individually under part number H4X70. Unit weight is approximately 3.6459 g. Review your operating media and conditions against this specification before installation.