Q-041 BUNA 70 Q RING

Part number QH70041 is an AS568-041 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 2.989 in (75.92 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.129 in (79.48 mm). A quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

This material stands up to hydraulic fluids, propane and butane, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). 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 fluid power, construction equipment, and agricultural equipment.

Reference part number QH70041 when ordering; the item is sold individually. Unit weight is approximately 0.7818 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.