*4437-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-437 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 5.975 in (151.77 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.525 in (165.74 mm), catalogued under part number HQ4437. It delivers lower friction and better sealing stability than a comparable round-section o-ring.

As a material, Buna-N (Nitrile) is valued for low compression set under sustained load, strong abrasion and tear resistance. The material holds up against hydraulic fluids, water, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or polar solvents. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

Typical settings include automotive, fluid power, and construction equipment.

This item is sold individually under part number HQ4437. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.