3MM CS X 390MM ID BLACK BUNA 70D

APG stocks the H3X390, a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 390 mm (15.354 in), a cross section of 3 mm (0.118 in), and an outside diameter of 396 mm (15.59 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) delivers the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. The material holds up against hydraulic fluids, water, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in polar solvents or ozone and direct sunlight.

You will find this material specified across fluid power, construction equipment, and general industrial maintenance.

Stocked as H3X390 and sold individually. Unit weight is approximately 10.417 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.