Q-157 BUNA 70 Q RING

Part number QH70157 is an AS568-157 black Buna-N (Nitrile) 70 Shore A 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. The profile itself contributes two sealing bands per contact face rather than one and resistance to the spiral twisting that defeats round-section rings.

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.