5.3MM CS X 73MM ID BLACK BUNA 70D

Part number H5.3X73 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 73 mm (2.874 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 83.6 mm (3.29 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists water, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or ketones.

It sees regular use in fluid power, hydraulic and pneumatic systems, and general industrial maintenance.

H5.3X73 ships individually. Unit weight is approximately 6.7555 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.