Q-449 BUNA 70 Q RING

Part number QH70449 is an AS568-449 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 9.975 in (253.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 10.525 in (267.34 mm). A quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

This material stands up to hydraulic fluids, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving strong acids or ozone and direct sunlight call for a different compound. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and two sealing bands per contact face rather than one.

Common environments for this compound include automotive, hydraulic and pneumatic systems, and general industrial maintenance.

Reference part number QH70449 when ordering; the item is sold individually. Unit weight is approximately 37.913 g. Check the compound against your process media, pressure and temperature before committing to a design.