568-388 BUNA 70 SQUARE CUT RINGS

Ordered as SH70388, this is an AS568-388 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring supplied with an inside diameter of 18.953 in (481.41 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 19.373 in (492.07 mm). The quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, strong abrasion and tear resistance. The material holds up against hydraulic fluids, petroleum-based oils, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include fluid power, agricultural equipment, and construction equipment.

Reference part number SH70388 when ordering; the item is sold individually. Nominal inside diameter is listed as 19 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.