Q-137 BUNA 70 Q RING

The QH70137 is an AS568-137 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 2.05 in (52.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.256 in (57.3 mm). This quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) delivers low compression set under sustained load, reliable performance in both static and dynamic service. Expect good resistance to petroleum-based oils, many alcohols, and hydraulic fluids. 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 strong acids are present. The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

You will find this material specified across hydraulic and pneumatic systems, automotive, and construction equipment.

Order part number QH70137, sold individually. Unit weight is approximately 1.19 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.