5.3MM CS X 45MM ID BLACK BUNA 70D

Ordered as H5.3X45, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 45 mm (1.772 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 55.6 mm (2.19 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to hydraulic fluids, water, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or strong acids will shorten service life.

You will find this material specified across hydraulic and pneumatic systems, automotive, and agricultural equipment.

Reference part number H5.3X45 when ordering; the item is sold individually. Unit weight is approximately 4.2931 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.