Buna 70-238-Black-Pk25

The SB-H70238-25 is an AS568-238 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.484 in (88.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.762 in (95.55 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Source specification: 0.139CSX3.484"IDX3.762"OD.

Buna-N (Nitrile) offers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Expect good resistance to petroleum-based oils, propane and butane, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or ozone and direct sunlight.

Common environments for this compound include agricultural equipment, fluid power, and hydraulic and pneumatic systems.

SB-H70238-25 ships by the bag. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.