568-018 BUNA 70 SQUARE CUT RINGS

APG stocks the SH70018, an AS568-018 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring measuring an inside diameter of 0.739 in (18.77 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.879 in (22.33 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The compound resists hydraulic fluids, greases and lubricants, and water. Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs and low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in hydraulic and pneumatic systems, general industrial maintenance, and automotive.

Reference part number SH70018 when ordering; the item is sold individually. Unit weight is approximately 0.2227 g and nominal inside diameter is listed as 3/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.