568-913 BUNA 70 SQUARE CUT RINGS

Part number SH70913 is an AS568-913 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 0.986 in (25.04 mm), a cross section of 0.116 in (2.95 mm), and an outside diameter of 1.218 in (30.94 mm). A square-cut ring presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

As a material, Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Expect good resistance to propane and butane, water, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in strong acids or ketones. The profile itself contributes a rectangular section that will not roll in the groove and greater resistance to extrusion than a round section of the same size. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

It sees regular use in hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.

Stocked as SH70913 and sold individually. Nominal inside diameter is listed as 13/16 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.