4MM CS X 205MM ID BLACK BUNA 70D

Ordered as H4X205, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 205 mm (8.071 in), a cross section of 4 mm (0.157 in), and an outside diameter of 213 mm (8.39 in). The o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Expect good resistance to propane and butane, greases and lubricants, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving ketones or strong acids call for a different compound.

Common environments for this compound include fluid power, agricultural equipment, and hydraulic and pneumatic systems.

Stocked as H4X205 and sold individually. Unit weight is approximately 10.079 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.