3MM CS X 39MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 39 mm (1.535 in), a cross section of 3 mm (0.118 in), and an outside diameter of 45 mm (1.77 in), catalogued under part number H3X39. It provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The compound resists greases and lubricants, water, and hydraulic fluids. Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or automotive brake fluid will shorten service life.

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

Stocked as H3X39 and sold individually. Unit weight is approximately 1.13 g. Check the compound against your process media, pressure and temperature before committing to a design.