Buna 70-431-Black-Pk5

The SB-H70431-5 is an AS568-431 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 5.225 in (132.72 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.775 in (146.69 mm). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. This item is further identified as 0.275CSX5.225"IDX5.775"OD.

As a material, Buna-N (Nitrile) delivers the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. The material holds up against hydraulic fluids, water, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ketones are present.

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

SB-H70431-5 ships by the bag. Nominal inside diameter is listed as 5 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.