4MM CS X 79MM ID BLACK BUNA 70D

H4X79 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 79 mm (3.11 in), a cross section of 4 mm (0.157 in), and an outside diameter of 87 mm (3.43 in). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.

It resists water, hydraulic fluids, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Common environments for this compound include construction equipment, hydraulic and pneumatic systems, and automotive.

H4X79 ships individually. Unit weight is approximately 4.0416 g. Check the compound against your process media, pressure and temperature before committing to a design.