Buna 70-336-Black-Pk50

SB-H70336-50 is an AS568-336 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.85 in (72.39 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.27 in (83.06 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint. Additional detail on this item: 3.25IDX2.875"ODX.1875"CS.

Expect good resistance to petroleum-based oils, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) offers strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ozone and direct sunlight are present.

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

SB-H70336-50 ships by the bag. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.