Q-261 BUNA 70 Q RING

Ordered as QH70261, this is an AS568-261 black Buna-N (Nitrile) 70 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). The quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The material holds up against many alcohols, water, and hydraulic fluids. Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or automotive brake fluid. The profile itself contributes lower compressive load required to achieve a seal and resistance to the spiral twisting that defeats round-section rings.

Common environments for this compound include hydraulic and pneumatic systems, fluid power, and agricultural equipment.

Reference part number QH70261 when ordering; the item is sold individually. Unit weight is approximately 6.353 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.