Q-013 BUNA 70 Q RING

APG stocks the QH70013, an AS568-013 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 0.426 in (10.82 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.566 in (14.38 mm). A quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

The compound resists many alcohols, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers reliable performance in both static and dynamic service, low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or polar solvents. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

Common environments for this compound include general industrial maintenance, agricultural equipment, and construction equipment.

QH70013 ships individually. Unit weight is approximately 0.135 g and nominal inside diameter is listed as 7/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.