4MM CS X 127MM ID BLACK BUNA 70D

Part number H4X127 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 127 mm (5 in), a cross section of 4 mm (0.157 in), and an outside diameter of 135 mm (5.31 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. The compound resists petroleum-based oils, greases and lubricants, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or polar solvents.

Maintenance and OEM teams specify it across fluid power, automotive, and general industrial maintenance.

H4X127 ships individually. Unit weight is approximately 6.316 g. Review your operating media and conditions against this specification before installation.