4MM CS X 18MM ID BLACK BUNA 70D

Part number H4X18 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 18 mm (0.709 in), a cross section of 4 mm (0.157 in), and an outside diameter of 26 mm (1.02 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The compound resists hydraulic fluids, many alcohols, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or ozone and direct sunlight call for a different compound.

It sees regular use in fluid power, construction equipment, and automotive.

H4X18 ships individually. Unit weight is approximately 1.078 g. Review your operating media and conditions against this specification before installation.