Buna 70-139-Black-Pk50

This o-ring is supplied in AS568-139 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 2.175 in (55.25 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.381 in (60.48 mm), catalogued under part number SB-H70139-50. It remains the most cost-effective sealing element available for pressurized assemblies. This item is further identified as 2.375IDX2.1875"ODX.0938"CS.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. Expect good resistance to propane and butane, water, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or polar solvents will shorten service life.

Maintenance and OEM teams specify it across construction equipment, automotive, and fluid power.

Order part number SB-H70139-50, sold by the bag. Application requirements vary, so validate compatibility with your process conditions prior to installation.