4348-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-348 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 4.35 in (110.49 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.77 in (121.16 mm), catalogued under part number HQ4348. It provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. The compound resists greases and lubricants, petroleum-based oils, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or ozone and direct sunlight. The profile itself contributes two sealing bands per contact face rather than one and resistance to the spiral twisting that defeats round-section rings.

You will find this material specified across fluid power, hydraulic and pneumatic systems, and automotive.

HQ4348 ships individually. Nominal inside diameter is listed as 4 3/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.