568-471 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-471 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 21.955 in (557.66 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 22.505 in (571.63 mm), catalogued under part number SH70471. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

The material holds up against water, many alcohols, and petroleum-based oils. 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. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where strong acids or ketones are present. The profile itself contributes greater resistance to extrusion than a round section of the same size and a flat contact band that spreads sealing load across a wider area. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

Common environments for this compound include fluid power, agricultural equipment, and construction equipment.

SH70471 ships individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.