Buna 70-444-Black-Pk2

The SB-H70444-2 is an AS568-444 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 7.725 in (196.22 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.275 in (210.19 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. This item is further identified as 0.275CSX7.725"IDX8.275"OD.

The compound resists many alcohols, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or ketones call for a different compound.

Typical settings include automotive, fluid power, and general industrial maintenance.

SB-H70444-2 ships by the bag. Nominal inside diameter is listed as 7 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.