568-230 BUNA 70 SQUARE CUT RINGS

Part number SH70230 is an AS568-230 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 2.484 in (63.09 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.762 in (70.15 mm). A square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

Buna-N (Nitrile) is specified here for low compression set under sustained load and most widely specified general-purpose sealing elastomer. Expect good resistance to many alcohols, petroleum-based oils, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in polar solvents or automotive brake fluid. 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.

You will find this material specified across hydraulic and pneumatic systems, automotive, and general industrial maintenance.

Reference part number SH70230 when ordering; the item is sold individually. Unit weight is approximately 2.9423 g and nominal inside diameter is listed as 2 1/2 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.