568-914 BUNA 70 SQUARE CUT RINGS

Part number SH70914 is an AS568-914 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring with an inside diameter of 1.047 in (26.59 mm), a cross section of 0.116 in (2.95 mm), and an outside diameter of 1.279 in (32.49 mm). A square-cut ring presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

Buna-N (Nitrile) offers strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Expect good resistance to petroleum-based oils, water, and many alcohols. 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 strong acids. The profile itself contributes a flat contact band that spreads sealing load across a wider area 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.

Maintenance and OEM teams specify it across fluid power, automotive, and hydraulic and pneumatic systems.

Reference part number SH70914 when ordering; the item is sold individually. Nominal inside diameter is listed as 7/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.