**4433-366Y MINNESOTA RUBBER QUAD RING

The HQ4433 is an AS568-433 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 5.475 in (139.07 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.025 in (153.04 mm). This quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, low compression set under sustained load. This material stands up to many alcohols, hydraulic fluids, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or ozone and direct sunlight are present. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

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

This item is sold individually under part number HQ4433. Nominal inside diameter is listed as 5 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.