568-467 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-467 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 18.955 in (481.46 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 19.505 in (495.43 mm), catalogued under part number SH70467. It provides an economical lathe-cut alternative where a moulded o-ring is not required.

Expect good resistance to hydraulic fluids, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or automotive brake fluid. The profile itself contributes greater resistance to extrusion than a round section of the same size and a rectangular section that will not roll in the groove. 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 fluid power, general industrial maintenance, and construction equipment.

Order part number SH70467, sold individually. Nominal inside diameter is listed as 19 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.