4466-366Y MINNESOTA RUBBER QUAD RING

APG stocks the HQ4466, an AS568-466 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 18.455 in (468.76 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 19.005 in (482.73 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

It resists greases and lubricants, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) offers strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in automotive brake fluid or strong acids. The profile itself contributes lower compressive load required to achieve a seal and resistance to the spiral twisting that defeats round-section rings.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, agricultural equipment, and construction equipment.

Stocked as HQ4466 and sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.