*4449-366Y MINNESOTA RUBBER QUAD RING

APG stocks the HQ4449, an AS568-449 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 9.975 in (253.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 10.525 in (267.34 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

It resists water, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or ketones. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

You will find this material specified across agricultural equipment, automotive, and fluid power.

This item is sold individually under part number HQ4449. Nominal inside diameter is listed as 10 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.