Q-344 BUNA 70 Q RING

QH70344 is an AS568-344 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 3.85 in (97.79 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.27 in (108.46 mm). In service, this quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Buna-N (Nitrile) is known for strong abrasion and tear resistance, low compression set under sustained load. This material stands up to propane and butane, greases and lubricants, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or ozone and direct sunlight call for a different compound. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and a parting line located away from the sealing surface.

It sees regular use in automotive, agricultural equipment, and construction equipment.

This item is sold individually under part number QH70344. Unit weight is approximately 8.5813 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.