3.1MM CS X 124.4MM ID BLACK BUNA 70D

APG stocks the H3.1X124.4, a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 124.4 mm (4.898 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 130.6 mm (5.14 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Supplementary detail from the product record: Metric O-RING, JIS G125.

Buna-N (Nitrile) is specified here for low compression set under sustained load and most widely specified general-purpose sealing elastomer. Expect good resistance to propane and butane, many alcohols, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or strong acids call for a different compound.

Typical settings include agricultural equipment, hydraulic and pneumatic systems, and fluid power.

This item is sold individually under part number H3.1X124.4. Unit weight is approximately 3.8013 g. Check the compound against your process media, pressure and temperature before committing to a design.