Buna 70-044-Black-Pk50

SB-H70044-50 is an AS568-044 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 3.739 in (94.97 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.879 in (98.53 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. This item is further identified as 3.875IDX3.75"ODX.0625"CS.

The compound resists hydraulic fluids, propane and butane, and water. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or polar solvents are present.

Common environments for this compound include hydraulic and pneumatic systems, general industrial maintenance, and automotive.

This item is sold by the bag under part number SB-H70044-50. Nominal inside diameter is listed as 3 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.