568-240 BUNA 70 SQUARE CUT RINGS

SH70240 is an AS568-240 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring supplied with an inside diameter of 3.734 in (94.84 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.012 in (101.9 mm). In service, this quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The material holds up against many alcohols, greases and lubricants, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) delivers low compression set under sustained load, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or polar solvents call for a different compound.

Common environments for this compound include agricultural equipment, construction equipment, and hydraulic and pneumatic systems.

This item is sold individually under part number SH70240. Unit weight is approximately 3.4941 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.