**4026-366Y MINNESOTA RUBBER QUAD RING

The HQ4026 is an AS568-026 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 1.239 in (31.47 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.379 in (35.03 mm). This quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

It resists water, greases and lubricants, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers low compression set under sustained load, reliable performance in both static and dynamic service. 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 polar solvents. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

Common environments for this compound include agricultural equipment, automotive, and general industrial maintenance.

HQ4026 ships individually. Nominal inside diameter is listed as 1 1/4 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.