Q-447 BUNA 70 Q RING

This quad-ring is supplied in AS568-447 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 8.975 in (227.97 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 9.525 in (241.94 mm), catalogued under part number QH70447. It seats in a standard o-ring gland while offering improved dynamic performance.

This material stands up to greases and lubricants, water, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ketones or polar solvents are present. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

Typical settings include fluid power, general industrial maintenance, and agricultural equipment.

Stocked as QH70447 and sold individually. Unit weight is approximately 34.884 g. 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.