Buna 70-138-Black-Pk50

Ordered as SB-H70138-50, this is an AS568-138 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.112 in (53.64 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.318 in (58.88 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. Additional detail on this item: 2.3125IDX2.125"ODX.0938"CS.

Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Expect good resistance to propane and butane, hydraulic fluids, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound.

Typical settings include fluid power, construction equipment, and general industrial maintenance.

This item is sold by the bag under part number SB-H70138-50. Nominal inside diameter is listed as 2 1/8 inch. Review your operating media and conditions against this specification before installation.