568-382 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-382 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 12.975 in (329.57 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 13.395 in (340.23 mm), catalogued under part number SH70382. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

As a material, Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Expect good resistance to propane and butane, hydraulic fluids, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ketones or polar solvents will shorten service life. The profile itself contributes simple lathe-cut manufacture at low tooling cost 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 construction equipment, fluid power, and agricultural equipment.

This item is sold individually under part number SH70382. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.