4MM CS X 122MM ID BLACK BUNA 70D

The H4X122 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 122 mm (4.803 in), a cross section of 4 mm (0.157 in), and an outside diameter of 130 mm (5.12 in). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The compound resists greases and lubricants, water, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or automotive brake fluid.

Maintenance and OEM teams specify it across automotive, construction equipment, and agricultural equipment.

This item is sold individually under part number H4X122. Unit weight is approximately 6.25 g. Review your operating media and conditions against this specification before installation.