Q-444 BUNA 70 Q RING

Ordered as QH70444, this is an AS568-444 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 7.725 in (196.22 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.275 in (210.19 mm). The quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and low compression set under sustained load. Expect good resistance to hydraulic fluids, water, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving ketones or strong acids call for a different compound. The profile itself contributes lower compressive load required to achieve a seal and a parting line located away from the sealing surface.

Maintenance and OEM teams specify it across agricultural equipment, general industrial maintenance, and construction equipment.

QH70444 ships individually. Unit weight is approximately 32.6 g and nominal inside diameter is listed as 7 3/4 inch. 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.