5.7MM CS X 79.3MM ID BLACK BUNA 70D

The H5.7X79.3 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 79.3 mm (3.122 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 90.7 mm (3.57 in). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) delivers low compression set under sustained load, reliable performance in both static and dynamic service. Expect good resistance to hydraulic fluids, many alcohols, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or polar solvents.

Maintenance and OEM teams specify it across construction equipment, fluid power, and automotive.

Order part number H5.7X79.3, sold individually. Unit weight is approximately 8.4494 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.