-208 BLACK BUNA 50D O-RING

Part number H50208 is an AS568-208 black Buna-N (Nitrile) 50 Shore A O-Ring measuring an inside diameter of 0.609 in (15.47 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.887 in (22.53 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to hydraulic fluids, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for low compression set under sustained load and an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ketones or ozone and direct sunlight.

Common environments for this compound include construction equipment, general industrial maintenance, and hydraulic and pneumatic systems.

Reference part number H50208 when ordering; the item is sold individually. Nominal inside diameter is listed as 5/8 inch. Review your operating media and conditions against this specification before installation.