5.3MM CS X 218MM ID BLACK BUNA 70D

The H5.3X218 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 218 mm (8.583 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 228.6 mm (9 in). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and low compression set under sustained load. This material stands up to water, petroleum-based oils, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound.

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

Stocked as H5.3X218 and sold individually. Unit weight is approximately 18.925 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.