568-427 BUNA 70 SQUARE CUT RINGS

Ordered as SH70427, this is an AS568-427 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring measuring an inside diameter of 4.725 in (120.02 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.275 in (133.99 mm). The quad-ring provides a dual sealing band on each contact face for improved reliability.

Expect good resistance to petroleum-based oils, many alcohols, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in automotive brake fluid or ozone and direct sunlight.

Maintenance and OEM teams specify it across general industrial maintenance, fluid power, and agricultural equipment.

SH70427 ships individually. Unit weight is approximately 17.6638 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.