5.3MM CS X 42.5MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 42.5 mm (1.673 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 53.1 mm (2.09 in), catalogued under part number H5.3X42.5. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. It resists greases and lubricants, many alcohols, and propane and butane. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.

Reference part number H5.3X42.5 when ordering; the item is sold individually. Unit weight is approximately 4.1105 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.