5.3MM CS X 106MM ID BLACK BUNA 70D

Ordered as H5.3X106, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 106 mm (4.173 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 116.6 mm (4.59 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to petroleum-based oils, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in polar solvents or automotive brake fluid.

Maintenance and OEM teams specify it across general industrial maintenance, hydraulic and pneumatic systems, and construction equipment.

This item is sold individually under part number H5.3X106. Unit weight is approximately 9.4031 g. Check the compound against your process media, pressure and temperature before committing to a design. 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.