Q-015 BUNA 70 Q RING

APG stocks the QH70015, an AS568-015 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 0.551 in (14 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.691 in (17.55 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The compound resists many alcohols, propane and butane, and greases and lubricants. 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). It should not be specified for service in polar solvents or automotive brake fluid. The profile itself contributes lower compressive load required to achieve a seal and a parting line located away from the sealing surface.

You will find this material specified across general industrial maintenance, fluid power, and construction equipment.

Stocked as QH70015 and sold individually. Unit weight is approximately 0.1582 g and nominal inside diameter is listed as 9/16 inch. Check the compound against your process media, pressure and temperature before committing to a design.