568-475 BUNA 70 SQUARE CUT RINGS

The SH70475 is an AS568-475 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 25.94 in (658.88 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 26.49 in (672.85 mm). This square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

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

You will find this material specified across automotive, fluid power, and construction equipment.

SH70475 ships individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.