4.5MM CS X 19MM ID BLACK BUNA 70D

APG stocks the H4.5X19, a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 19 mm (0.748 in), a cross section of 4.5 mm (0.177 in), and an outside diameter of 28 mm (1.1 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) offers reliable performance in both static and dynamic service, low compression set under sustained load. Expect good resistance to water, hydraulic fluids, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in general industrial maintenance, fluid power, and agricultural equipment.

Reference part number H4.5X19 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.