Q-444 BUNA 70 Q RING

Ordered as QH70444, this is an AS568-444 black Buna-N (Nitrile) 70 Shore A quad profile 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.

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.