5.3MM CS X 115MM ID BLACK BUNA 70D

Part number H5.3X115 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 115 mm (4.528 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 125.6 mm (4.94 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to propane and butane, hydraulic fluids, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Maintenance and OEM teams specify it across agricultural equipment, fluid power, and general industrial maintenance.

Order part number H5.3X115, sold individually. Unit weight is approximately 10.428 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.