*4018-366Y MINNESOTA RUBBER QUAD RING

Part number HQ4018 is an AS568-018 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 0.739 in (18.77 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.879 in (22.33 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

As a material, Buna-N (Nitrile) is known for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. The compound resists water, hydraulic fluids, and propane and butane. Service temperature is rated from -40°F (-40°C) through 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, general industrial maintenance, and fluid power.

Reference part number HQ4018 when ordering; the item is sold individually. Nominal inside diameter is listed as 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.