568-339 BUNA 70 SQUARE CUT RINGS

This quad-ring is supplied in AS568-339 black Buna-N (Nitrile) 70 Shore A square profile measuring an inside diameter of 3.225 in (81.92 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.645 in (92.58 mm), catalogued under part number SH70339. It provides a dual sealing band on each contact face for improved reliability.

The compound resists propane and butane, greases and lubricants, and hydraulic fluids. Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or polar solvents.

You will find this material specified across hydraulic and pneumatic systems, construction equipment, and automotive.

SH70339 ships individually. Unit weight is approximately 9.0832 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.