3MM CS X 44.5MM ID BLACK BUNA 90D

H90M3X44.5 is a black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 44.5 mm (1.752 in), a cross section of 3 mm (0.118 in), and an outside diameter of 50.5 mm (1.99 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against petroleum-based oils, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or strong acids call for a different compound.

You will find this material specified across fluid power, general industrial maintenance, and hydraulic and pneumatic systems.

Stocked as H90M3X44.5 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.