4MM CS X 72MM ID BLACK BUNA 70D

APG stocks the H4X72, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 72 mm (2.835 in), a cross section of 4 mm (0.157 in), and an outside diameter of 80 mm (3.15 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) is known for low compression set under sustained load, reliable performance in both static and dynamic service. It resists hydraulic fluids, propane and butane, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or ozone and direct sunlight.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and construction equipment.

H4X72 ships individually. Unit weight is approximately 3.7138 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.