3.55MM CS X 50MM ID BLACK BUNA 70D

H3.55X50 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 50 mm (1.969 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 57.1 mm (2.25 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to greases and lubricants, many alcohols, and water. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where strong acids or polar solvents are present.

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

Stocked as H3.55X50 and sold individually. Unit weight is approximately 2.0082 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.