Q-365 BUNA 70 Q RING

This quad-ring is supplied in AS568-365 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 6.975 in (177.17 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 7.395 in (187.83 mm), catalogued under part number QH70365. It seats in a standard o-ring gland while offering improved dynamic performance.

Expect good resistance to petroleum-based oils, greases and lubricants, and propane and butane. Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or polar solvents call for a different compound. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

Typical settings include general industrial maintenance, construction equipment, and automotive.

Order part number QH70365, sold individually. Unit weight is approximately 15.294 g and nominal inside diameter is listed as 7 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.