3MM CS X 119.5MM ID BLACK BUNA 90D

APG stocks the H90M3X119.5, a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 119.5 mm (4.705 in), a cross section of 3 mm (0.118 in), and an outside diameter of 125.5 mm (4.94 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, low compression set under sustained load. The material holds up against petroleum-based oils, many alcohols, and hydraulic fluids. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ketones or polar solvents are present.

You will find this material specified across agricultural equipment, fluid power, and general industrial maintenance.

H90M3X119.5 ships individually. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.