5.3MM CS X 109MM ID BLACK BUNA 70D

Part number H5.3X109 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 109 mm (4.291 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 119.6 mm (4.71 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to petroleum-based oils, many alcohols, and greases and lubricants. Buna-N (Nitrile) offers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or automotive brake fluid call for a different compound.

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

This item is sold individually under part number H5.3X109. Unit weight is approximately 9.9875 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.