Q-239 BUNA 70 Q RING

QH70239 is an AS568-239 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 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, reliable performance in both static and dynamic service. It resists petroleum-based oils, water, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

You will find this material specified across hydraulic and pneumatic systems, automotive, and fluid power.

Order part number QH70239, sold individually. Unit weight is approximately 3.83 g and nominal inside diameter is listed as 3 5/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.