568-265 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-265 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 7.734 in (196.44 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 8.012 in (203.5 mm), catalogued under part number SH70265. It provides an economical lathe-cut alternative where a moulded o-ring is not required.

The compound resists petroleum-based oils, hydraulic fluids, and greases and lubricants. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or ketones call for a different compound. 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 agricultural equipment, hydraulic and pneumatic systems, and automotive.

This item is sold individually under part number SH70265. Unit weight is approximately 7.656 g and nominal inside diameter is listed as 7 3/4 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.