4MM CS X 5MM ID BLACK BUNA 70D

H4X5 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 5 mm (0.197 in), a cross section of 4 mm (0.157 in), and an outside diameter of 13 mm (0.51 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) is widely chosen for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Expect good resistance to petroleum-based oils, propane and butane, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or strong acids.

Typical settings include construction equipment, automotive, and fluid power.

Reference part number H4X5 when ordering; the item is sold individually. Unit weight is approximately 0.434 g. Check the compound against your process media, pressure and temperature before committing to a design.