-390 BLACK BUNA 70D O-RING

Ordered as H70390, this is an AS568-390 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 20.953 in (532.21 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 21.373 in (542.87 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. It resists greases and lubricants, propane and butane, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or strong acids call for a different compound.

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

Stocked as H70390 and sold individually. Unit weight is approximately 46.0174 g and nominal inside diameter is listed as 21 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.