-905 BLACK BUNA 70D O-RING

Part number H70905 is an AS568-905 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 0.414 in (10.52 mm), a cross section of 0.072 in (1.83 mm), and an outside diameter of 0.558 in (14.17 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) offers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Expect good resistance to propane and butane, petroleum-based oils, and hydraulic fluids. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ketones or ozone and direct sunlight will shorten service life.

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

Stocked as H70905 and sold individually. Unit weight is approximately 0.1333 g and nominal inside diameter is listed as 5/16 inch. 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.