3MM CS X 79.5MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A with an inside diameter of 79.5 mm (3.13 in), a cross section of 3 mm (0.118 in), and an outside diameter of 85.5 mm (3.37 in), catalogued under part number H3X79.5. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to propane and butane, greases and lubricants, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or strong acids will shorten service life.

Maintenance and OEM teams specify it across general industrial maintenance, construction equipment, and fluid power.

H3X79.5 ships individually. Unit weight is approximately 2.3132 g. Check the compound against your process media, pressure and temperature before committing to a design.