568-013 BUNA 70 SQUARE CUT RINGS

Ordered as SH70013, this is an AS568-013 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring measuring an inside diameter of 0.426 in (10.82 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.566 in (14.38 mm). The square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

The compound resists greases and lubricants, petroleum-based oils, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for low compression set under sustained load, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving strong acids or ozone and direct sunlight call for a different compound. 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 automotive, hydraulic and pneumatic systems, and general industrial maintenance.

This item is sold individually under part number SH70013. Unit weight is approximately 0.1367 g and nominal inside diameter is listed as 7/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.