Buna 70-043-Black-Pk50

SB-H70043-50 is an AS568-043 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 3.489 in (88.62 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.629 in (92.18 mm). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Additional detail on this item: 3.625IDX3.5"ODX.0625"CS.

Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The compound resists greases and lubricants, hydraulic fluids, and water. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or strong acids call for a different compound.

Maintenance and OEM teams specify it across general industrial maintenance, hydraulic and pneumatic systems, and agricultural equipment.

Order part number SB-H70043-50, sold by the bag. Nominal inside diameter is listed as 3 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.