5.3MM CS X 56MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A with an inside diameter of 56 mm (2.205 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 66.6 mm (2.62 in), catalogued under part number H5.3X56. It delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against water, hydraulic fluids, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or strong acids are present.

Common environments for this compound include fluid power, general industrial maintenance, and construction equipment.

Stocked as H5.3X56 and sold individually. Unit weight is approximately 5.2209 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.