*4120-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-120 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 0.987 in (25.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.193 in (30.3 mm), catalogued under part number HQ4120. It provides a dual sealing band on each contact face for improved reliability.

The compound resists many alcohols, hydraulic fluids, and greases and lubricants. Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or ketones will shorten service life. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and agricultural equipment.

This item is sold individually under part number HQ4120. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.