568-278 BUNA 70 SQUARE CUT RINGS

Ordered as SH70278, this is an AS568-278 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring measuring an inside diameter of 11.984 in (304.39 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 12.262 in (311.45 mm). The quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

The compound resists petroleum-based oils, greases and lubricants, and propane and butane. Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or ozone and direct sunlight.

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

Stocked as SH70278 and sold individually. Nominal inside diameter is listed as 12 inch. Check the compound against your process media, pressure and temperature before committing to a design.