3MM CS X 184.5MM ID BLACK BUNA 70D

Ordered as H3X184.5, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 184.5 mm (7.264 in), a cross section of 3 mm (0.118 in), and an outside diameter of 190.5 mm (7.5 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to hydraulic fluids, greases and lubricants, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to ozone and direct sunlight or ketones will shorten service life.

You will find this material specified across automotive, construction equipment, and fluid power.

Stocked as H3X184.5 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.