568-020 BUNA 70 SQUARE CUT RINGS

This quad-ring is supplied in AS568-020 black Buna-N (Nitrile) 70 Shore A square profile with an inside diameter of 0.864 in (21.95 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.004 in (25.5 mm), catalogued under part number SH70020. It resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, most widely specified general-purpose sealing elastomer. The material holds up against petroleum-based oils, hydraulic fluids, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound.

Maintenance and OEM teams specify it across fluid power, automotive, and agricultural equipment.

SH70020 ships individually. Unit weight is approximately 0.3036 g and nominal inside diameter is listed as 7/8 inch. 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.