4342-366Y MINNESOTA RUBBER QUAD RING

APG stocks the HQ4342, an AS568-342 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 3.6 in (91.44 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.02 in (102.11 mm). A quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

The compound resists hydraulic fluids, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for strong abrasion and tear resistance, reliable performance in both static and dynamic service. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ketones will shorten service life. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

It sees regular use in agricultural equipment, automotive, and fluid power.

This item is sold individually under part number HQ4342. Check the compound against your process media, pressure and temperature before committing to a design.