Q-346 BUNA 70 Q RING

Ordered as QH70346, this is an AS568-346 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 4.1 in (104.14 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.52 in (114.81 mm). The quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

The compound resists water, petroleum-based oils, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers low compression set under sustained load, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in polar solvents or strong acids. The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

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

Order part number QH70346, sold individually. Unit weight is approximately 8.8458 g. Check the compound against your process media, pressure and temperature before committing to a design.