8.4MM CS X 174.1MM ID BLACK BUNA 70D

Ordered as H8.4X174.1, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 174.1 mm (6.854 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 190.9 mm (7.52 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

It resists many alcohols, hydraulic fluids, and water. That behavior comes from the compound itself: Buna-N (Nitrile) offers reliable performance in both static and dynamic service, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving ozone and direct sunlight or polar solvents call for a different compound.

Typical settings include agricultural equipment, hydraulic and pneumatic systems, and automotive.

Order part number H8.4X174.1, sold individually. Unit weight is approximately 38.894 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.