*4149-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-149 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 2.8 in (71.12 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.006 in (76.35 mm), catalogued under part number HQ4149. It resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The material holds up against hydraulic fluids, many alcohols, and water. Buna-N (Nitrile) delivers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving polar solvents or ketones call for a different compound. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

Typical settings include hydraulic and pneumatic systems, general industrial maintenance, and agricultural equipment.

Reference part number HQ4149 when ordering; the item is sold individually. Review your operating media and conditions against this specification before installation.