*4021-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-021 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 0.926 in (23.52 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.066 in (27.08 mm), catalogued under part number HQ4021. It seats in a standard o-ring gland while offering improved dynamic performance.

The compound resists petroleum-based oils, greases and lubricants, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs 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 ketones or ozone and direct sunlight. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

It sees regular use in general industrial maintenance, hydraulic and pneumatic systems, and automotive.

This item is sold individually under part number HQ4021. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.