*4385-366Y MINNESOTA RUBBER QUAD RING

HQ4385 is an AS568-385 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring supplied with an inside diameter of 15.955 in (405.26 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 16.375 in (415.93 mm). In service, this quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

As a material, Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, low compression set under sustained load. The compound resists greases and lubricants, petroleum-based oils, and hydraulic fluids. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to automotive brake fluid or polar solvents will shorten service life.

You will find this material specified across general industrial maintenance, fluid power, and agricultural equipment.

Reference part number HQ4385 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design.