4237-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-237 black Buna-N (Nitrile) 70 Shore A quad profile built to an inside diameter of 3.359 in (85.32 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.637 in (92.38 mm), catalogued under part number HQ4237. It provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, low compression set under sustained load. It resists propane and butane, hydraulic fluids, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving strong acids or polar solvents call for a different compound.

It sees regular use in hydraulic and pneumatic systems, agricultural equipment, and automotive.

This item is sold individually under part number HQ4237. Nominal inside diameter is listed as 3 3/8. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.