-389 BLACK BUNA 70D O-RING

Part number H70389 is an AS568-389 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 19.953 in (506.81 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 20.373 in (517.47 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. The compound resists hydraulic fluids, greases and lubricants, and water. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ketones or polar solvents will shorten service life.

You will find this material specified across agricultural equipment, general industrial maintenance, and hydraulic and pneumatic systems.

H70389 ships individually. Unit weight is approximately 43.72 g and nominal inside diameter is listed as 20 inch. Review your operating media and conditions against this specification before installation.