Buna 70-161-Black-Pk25

Part number SB-H70161-25 is an AS568-161 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 5.487 in (139.37 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 5.693 in (144.6 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Source specification: 5.6875IDX5.5"ODX.0938"CS.

The material holds up against many alcohols, propane and butane, and hydraulic fluids. Buna-N (Nitrile) is valued 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 ozone and direct sunlight or strong acids will shorten service life.

It sees regular use in agricultural equipment, hydraulic and pneumatic systems, and general industrial maintenance.

Stocked as SB-H70161-25 and sold by the bag. Nominal inside diameter is listed as 5 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. 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.