Q-028 BUNA 70 Q RING

QH70028 is an AS568-028 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring built to an inside diameter of 1.364 in (34.65 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.504 in (38.2 mm). In service, this quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Expect good resistance to water, many alcohols, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer and 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 is not the right choice where polar solvents or automotive brake fluid are present.

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

QH70028 ships individually. Unit weight is approximately 0.3604 g and nominal inside diameter is listed as 1 3/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.