3.53MM CS X 68.26MM ID BLACK BUNA 90D

Ordered as H90M3.53X68.26, this is a black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 68.26 mm (2.687 in), a cross section of 3.53 mm (0.139 in), and an outside diameter of 75.32 mm (2.97 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

It resists hydraulic fluids, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or ketones call for a different compound.

It sees regular use in hydraulic and pneumatic systems, fluid power, and automotive.

Stocked as H90M3.53X68.26 and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.