*4264-366Y MINNESOTA RUBBER QUAD RING

Ordered as HQ4264, this is an AS568-264 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 7.484 in (190.09 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 7.762 in (197.15 mm). The quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

It resists greases and lubricants, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

Common environments for this compound include hydraulic and pneumatic systems, fluid power, and automotive.

HQ4264 ships individually. Nominal inside diameter is listed as 7 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design.