Buna 70-429-Black-Pk5

The SB-H70429-5 is an AS568-429 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 4.975 in (126.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.525 in (140.34 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Supplementary detail from the product record: 5.5IDX5"ODX.25"CS.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The material holds up against propane and butane, many alcohols, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or ozone and direct sunlight.

It sees regular use in automotive, fluid power, and hydraulic and pneumatic systems.

Stocked as SB-H70429-5 and sold by the bag. As always, verify media compatibility and operating conditions against the requirements of your specific application.