5.3MM CS X 43.7MM ID BLACK BUNA 70D

H5.3X43.7 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 43.7 mm (1.72 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 54.3 mm (2.14 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. It resists propane and butane, water, and greases and lubricants. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or automotive brake fluid call for a different compound.

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

Order part number H5.3X43.7, sold individually. Unit weight is approximately 4.2131 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.