Buna 70-231-Black-Pk50

SB-H70231-50 is an AS568-231 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 2.609 in (66.27 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.887 in (73.33 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. Additional detail on this item: 2.875IDX2.625"ODX.125"CS.

It resists hydraulic fluids, greases and lubricants, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) offers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

It sees regular use in hydraulic and pneumatic systems, agricultural equipment, and fluid power.

Order part number SB-H70231-50, sold by the bag. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.