3MM CS X 42.2MM ID BLACK BUNA 70D

Ordered as H3X42.2, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 42.2 mm (1.661 in), a cross section of 3 mm (0.118 in), and an outside diameter of 48.2 mm (1.9 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The compound resists greases and lubricants, propane and butane, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or polar solvents will shorten service life.

Typical settings include fluid power, automotive, and general industrial maintenance.

Order part number H3X42.2, sold individually. Unit weight is approximately 1.2206 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.