Buna 70-268-Black-Pk5

SB-H70268-5 is an AS568-268 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 8.484 in (215.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 8.762 in (222.55 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies. Supplementary detail from the product record: 8.75IDX8.5"ODX.125"CS.

Expect good resistance to greases and lubricants, many alcohols, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or polar solvents will shorten service life.

It sees regular use in automotive, general industrial maintenance, and fluid power.

This item is sold by the bag under part number SB-H70268-5. As always, verify media compatibility and operating conditions against the requirements of your specific application.