4MM CS X 101MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 101 mm (3.976 in), a cross section of 4 mm (0.157 in), and an outside diameter of 109 mm (4.29 in), catalogued under part number H4X101. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to hydraulic fluids, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or ozone and direct sunlight will shorten service life.

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

This item is sold individually under part number H4X101. Unit weight is approximately 5.12 g. Review your operating media and conditions against this specification before installation.