3.5MM CS X 180MM ID BLACK BUNA 70D

Part number H3.5X180 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 180 mm (7.087 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 187 mm (7.36 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

It resists many alcohols, hydraulic fluids, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to strong acids or automotive brake fluid will shorten service life.

Typical settings include agricultural equipment, hydraulic and pneumatic systems, and general industrial maintenance.

Order part number H3.5X180, sold individually. Unit weight is approximately 6.78 g. Check the compound against your process media, pressure and temperature before committing to a design.