Q-168 BUNA 70 Q RING

QH70168 is an AS568-168 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 7.237 in (183.82 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 7.443 in (189.05 mm). In service, this quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Expect good resistance to hydraulic fluids, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) delivers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or strong acids call for a different compound. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and a parting line located away from the sealing surface.

Typical settings include general industrial maintenance, agricultural equipment, and fluid power.

Stocked as QH70168 and sold individually. Unit weight is approximately 4.234 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.