4345-366Y MINNESOTA RUBBER QUAD RING

Part number HQ4345 is an AS568-345 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 3.975 in (100.97 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.395 in (111.63 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

As a material, Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. This material stands up to petroleum-based oils, hydraulic fluids, and water. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

You will find this material specified across automotive, construction equipment, and general industrial maintenance.

Stocked as HQ4345 and sold individually. Nominal inside diameter is listed as 4 inch. 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.