1.78MM CS X 8.75MM ID BLACK BUNA 90D

Ordered as H90M1.78X8.75, this is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 8.75 mm (0.344 in), a cross section of 1.78 mm (0.07 in), and an outside diameter of 12.31 mm (0.48 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The compound resists greases and lubricants, propane and butane, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or ketones call for a different compound.

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

Reference part number H90M1.78X8.75 when ordering; the item is sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.