4137-366Y MINNESOTA RUBBER QUAD RING

HQ4137 is an AS568-137 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 2.05 in (52.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.256 in (57.3 mm). In service, this quad-ring provides a dual sealing band on each contact face for improved reliability.

Expect good resistance to hydraulic fluids, water, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in polar solvents or ozone and direct sunlight. The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

You will find this material specified across construction equipment, hydraulic and pneumatic systems, and automotive.

This item is sold individually under part number HQ4137. Nominal inside diameter is listed as 2 1/16 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.