**4380-366Y MINNESOTA RUBBER QUAD RING

HQ4380 is an AS568-380 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 11.475 in (291.47 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 11.895 in (302.13 mm). In service, this quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

This material stands up to propane and butane, hydraulic fluids, and many alcohols. Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and general industrial maintenance.

HQ4380 ships individually. Nominal inside diameter is listed as 11 1/2. Check the compound against your process media, pressure and temperature before committing to a design.