Q-026 BUNA 70 Q RING

APG stocks the QH70026, an AS568-026 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 1.239 in (31.47 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.379 in (35.03 mm). A quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. The material holds up against many alcohols, petroleum-based oils, and hydraulic fluids. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in strong acids or automotive brake fluid. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, fluid power, and general industrial maintenance.

QH70026 ships individually. Unit weight is approximately 0.3278 g and nominal inside diameter is listed as 1 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design.