4263-366Y MINNESOTA RUBBER QUAD RING

HQ4263 is an AS568-263 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 7.234 in (183.74 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 7.512 in (190.8 mm). In service, this quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

This material stands up to greases and lubricants, propane and butane, and hydraulic fluids. Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or automotive brake fluid call for a different compound. The profile itself contributes two sealing bands per contact face rather than one and resistance to the spiral twisting that defeats round-section rings.

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

This item is sold individually under part number HQ4263. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.