Q-004 BUNA 70 Q RING

This quad-ring is supplied in AS568-004 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 0.07 in (1.78 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.21 in (5.33 mm), catalogued under part number QH70004. It seats in a standard o-ring gland while offering improved dynamic performance.

As a material, Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, low compression set under sustained load. This material stands up to propane and butane, water, and hydraulic fluids. 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 resistance to the spiral twisting that defeats round-section rings and a parting line located away from the sealing surface.

You will find this material specified across agricultural equipment, fluid power, and automotive.

QH70004 ships individually. Unit weight is approximately 0.035 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.