Q-441 BUNA 70 Q RING

QH70441 is an AS568-441 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 6.975 in (177.17 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.525 in (191.14 mm). In service, this quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Expect good resistance to many alcohols, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) offers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight 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, agricultural equipment, and hydraulic and pneumatic systems.

QH70441 ships individually. Unit weight is approximately 27.021 g and nominal inside diameter is listed as 7 inch. Check the compound against your process media, pressure and temperature before committing to a design.