4013-366Y MINNESOTA RUBBER QUAD RING

Part number HQ4013 is an AS568-013 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 0.426 in (10.82 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.566 in (14.38 mm). A quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, low compression set under sustained load. It resists water, petroleum-based oils, and greases and lubricants. 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. The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

Typical settings include general industrial maintenance, construction equipment, and hydraulic and pneumatic systems.

Reference part number HQ4013 when ordering; the item is sold individually. Nominal inside diameter is listed as 7/16 inch. Check the compound against your process media, pressure and temperature before committing to a design.