Q-157 BUNA 70 Q RING

Part number QH70157 is an AS568-157 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring built to an inside diameter of 4.487 in (113.97 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.693 in (119.2 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

The compound resists hydraulic fluids, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. 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 ketones.

Typical settings include agricultural equipment, general industrial maintenance, and construction equipment.

QH70157 ships individually. Unit weight is approximately 2.3442 g and nominal inside diameter is listed as 4 1/2 inch. Review your operating media and conditions against this specification before installation.