Q-209 BUNA 70 Q RING

The QH70209 is an AS568-209 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 0.671 in (17.04 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.949 in (24.1 mm). This quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. It resists propane and butane, hydraulic fluids, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where polar solvents or strong acids are present. The profile itself contributes lower compressive load required to achieve a seal and resistance to the spiral twisting that defeats round-section rings.

Maintenance and OEM teams specify it across fluid power, automotive, and hydraulic and pneumatic systems.

Order part number QH70209, sold individually. Unit weight is approximately 0.818 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.