*568-429 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-429 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 4.975 in (126.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.525 in (140.34 mm), catalogued under part number SH70429. 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, petroleum-based oils, and propane and butane. Buna-N (Nitrile) is valued for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). The profile itself contributes a rectangular section that will not roll in the groove and simple lathe-cut manufacture at low tooling cost. 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 construction equipment, hydraulic and pneumatic systems, and fluid power.

This item is sold individually under part number SH70429. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.