2.5MM CS X 129MM ID BLACK BUNA 70D

H2.5X129 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 129 mm (5.079 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 134 mm (5.28 in). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is widely chosen for low compression set under sustained load and an economical choice for high-volume maintenance programs. The compound resists greases and lubricants, propane and butane, and water. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or ketones are present.

You will find this material specified across general industrial maintenance, automotive, and hydraulic and pneumatic systems.

Stocked as H2.5X129 and sold individually. Unit weight is approximately 2.598 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.