3MM CS X 50.2MM ID BLACK BUNA 70D

Part number H3X50.2 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 50.2 mm (1.976 in), a cross section of 3 mm (0.118 in), and an outside diameter of 56.2 mm (2.21 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to many alcohols, hydraulic fluids, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for strong abrasion and tear resistance, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving polar solvents or automotive brake fluid call for a different compound.

It sees regular use in hydraulic and pneumatic systems, agricultural equipment, and automotive.

This item is sold individually under part number H3X50.2. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.