3.55MM CS X 122MM ID BLACK BUNA 70D

APG stocks the H3.55X122, a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 122 mm (4.803 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 129.1 mm (5.08 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The material holds up against petroleum-based oils, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers the most widely specified general-purpose sealing elastomer and low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or ketones will shorten service life.

Typical settings include automotive, fluid power, and construction equipment.

This item is sold individually under part number H3.55X122. Unit weight is approximately 4.8055 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.