-918 BLACK BUNA 50D O-RING

This o-ring is supplied in AS568-918 black Buna-N (Nitrile) 50 Shore A measuring an inside diameter of 1.355 in (34.42 mm), a cross section of 0.116 in (2.95 mm), and an outside diameter of 1.587 in (40.31 mm), catalogued under part number H50918. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to greases and lubricants, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, 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 strong acids or polar solvents call for a different compound.

Typical settings include agricultural equipment, automotive, and construction equipment.

Reference part number H50918 when ordering; the item is sold individually. Nominal inside diameter is listed as 1 1/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.