4209-366Y MINNESOTA RUBBER QUAD RING

The HQ4209 is an AS568-209 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 0.671 in (17.04 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.949 in (24.1 mm). This quad-ring provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. The compound resists hydraulic fluids, greases and lubricants, and water. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or automotive brake fluid will shorten service life. The profile itself contributes lower compressive load required to achieve a seal and a parting line located away from the sealing surface.

It sees regular use in general industrial maintenance, construction equipment, and hydraulic and pneumatic systems.

Order part number HQ4209, sold individually. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.