Q-261 FLUOROELASTOMER 75 Q RING

APG stocks the QV70261, an AS568-261 black Viton® (FKM) 75 Shore A Quad-Ring with an inside diameter of 6.734 in (171.04 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 7.012 in (178.1 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Expect good resistance to engine and transmission fluids, aromatic hydrocarbons, and many acids. Viton® (FKM) is valued for outstanding high-temperature capability and the industry benchmark where nitrile reaches its thermal limit. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Verify compatibility before use with low-molecular-weight organic acids or amines. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

Typical settings include semiconductor equipment, chemical processing, and aerospace.

Stocked as QV70261 and sold individually. Unit weight is approximately 10.638 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.