Buna 70-040-Black-Pk10

The SB-H70040-10 is an AS568-040 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.864 in (72.75 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.004 in (76.3 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope. The catalog record notes: 0.070CSX2.864"IDX3.004"OD.

As a material, Buna-N (Nitrile) is valued for low compression set under sustained load, strong abrasion and tear resistance. It resists petroleum-based oils, propane and butane, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or strong acids call for a different compound.

You will find this material specified across fluid power, construction equipment, and general industrial maintenance.

Stocked as SB-H70040-10 and sold by the bag. Nominal inside diameter is listed as 2 7/8 inch. Review your operating media and conditions against this specification before installation.