4MM CS X 70MM ID BLACK BUNA 90D

Ordered as H90M4X70, this is a black Buna-N (Nitrile) 90 Shore A O-Ring with 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). The o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to water, petroleum-based oils, and many alcohols. Buna-N (Nitrile) is specified 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). It is not the right choice where ozone and direct sunlight or ketones are present.

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

This item is sold individually under part number H90M4X70. Unit weight is approximately 4.1188 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.