Q-453 BUNA 70 Q RING

QH70453 is an AS568-453 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 11.975 in (304.17 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 12.525 in (318.14 mm). In service, this quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

It resists hydraulic fluids, propane and butane, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. 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 two sealing bands per contact face rather than one.

Maintenance and OEM teams specify it across fluid power, agricultural equipment, and general industrial maintenance.

Stocked as QH70453 and sold individually. Unit weight is approximately 50.63 g and nominal inside diameter is listed as 12 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.