3.5MM CS X 20MM ID BLACK BUNA 70D

Part number H3.5X20 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 20 mm (0.787 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 27 mm (1.06 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists water, greases and lubricants, and petroleum-based oils. Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or automotive brake fluid call for a different compound.

It sees regular use in fluid power, hydraulic and pneumatic systems, and automotive.

Stocked as H3.5X20 and sold individually. Unit weight is approximately 0.867 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.