4MM CS X 73MM ID BLACK BUNA 70D

APG stocks the H4X73, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 73 mm (2.874 in), a cross section of 4 mm (0.157 in), and an outside diameter of 81 mm (3.19 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The compound resists greases and lubricants, hydraulic fluids, and petroleum-based oils. Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs and low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving polar solvents or automotive brake fluid call for a different compound.

It sees regular use in automotive, fluid power, and general industrial maintenance.

This item is sold individually under part number H4X73. Unit weight is approximately 3.7701 g. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.