3MM CS X 250MM ID BLACK BUNA 70D

APG stocks the H3X250, a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 250 mm (9.843 in), a cross section of 3 mm (0.118 in), and an outside diameter of 256 mm (10.08 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to hydraulic fluids, many alcohols, and petroleum-based oils. Buna-N (Nitrile) is known for low compression set under sustained load and an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or polar solvents call for a different compound.

Common environments for this compound include agricultural equipment, fluid power, and construction equipment.

Stocked as H3X250 and sold individually. Unit weight is approximately 6.757 g. 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.