Q-122 BUNA 70 Q RING

The QH70122 is an AS568-122 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 1.112 in (28.24 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.318 in (33.48 mm). This quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

It resists propane and butane, many alcohols, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers strong abrasion and tear resistance, low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or automotive brake fluid are present. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

It sees regular use in general industrial maintenance, automotive, and construction equipment.

Stocked as QH70122 and sold individually. Unit weight is approximately 0.6275 g. 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.