Q-271 BUNA 70 Q RING

QH70271 is an AS568-271 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 9.234 in (234.54 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 9.512 in (241.6 mm). In service, this quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

The material holds up against water, petroleum-based oils, and greases and lubricants. Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where automotive brake fluid or ozone and direct sunlight are present. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and a parting line located away from the sealing surface.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.

Stocked as QH70271 and sold individually. Unit weight is approximately 8.9621 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.