3.55MM CS X 118MM ID BLACK BUNA 70D

Ordered as H3.55X118, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 118 mm (4.646 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 125.1 mm (4.93 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

It resists water, many alcohols, and greases and lubricants. Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to polar solvents or ozone and direct sunlight will shorten service life.

Maintenance and OEM teams specify it across agricultural equipment, construction equipment, and hydraulic and pneumatic systems.

Order part number H3.55X118, sold individually. Unit weight is approximately 4.6954 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.