568-346 BUNA 70 SQUARE CUT RINGS

Part number SH70346 is an AS568-346 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring built to an inside diameter of 4.1 in (104.14 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.52 in (114.81 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

This material stands up to water, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for 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 is not the right choice where strong acids or polar solvents are present.

You will find this material specified across construction equipment, hydraulic and pneumatic systems, and general industrial maintenance.

Reference part number SH70346 when ordering; the item is sold individually. Review your operating media and conditions against this specification before installation.