4112-366Y MINNESOTA RUBBER QUAD RING

Part number HQ4112 is an AS568-112 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 0.487 in (12.37 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.693 in (17.6 mm). A quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

As a material, Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. It resists hydraulic fluids, propane and butane, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes lower compressive load required to achieve a seal and resistance to the spiral twisting that defeats round-section rings.

You will find this material specified across hydraulic and pneumatic systems, construction equipment, and agricultural equipment.

Stocked as HQ4112 and sold individually. Nominal inside diameter is listed as 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.