Q-352 BUNA 70 Q RING

QH70352 is an AS568-352 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 4.85 in (123.19 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.27 in (133.86 mm). In service, this quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, low compression set under sustained load. The material holds up against petroleum-based oils, many alcohols, and propane and butane. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in polar solvents or automotive brake fluid. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

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

Stocked as QH70352 and sold individually. Unit weight is approximately 10.988 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.