Q-431 BUNA 70 Q RING

Ordered as QH70431, this is an AS568-431 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 5.225 in (132.72 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.775 in (146.69 mm). The quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

As a material, Buna-N (Nitrile) is specified for strong abrasion and tear resistance, low compression set under sustained load. This material stands up to hydraulic fluids, petroleum-based oils, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or ketones. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

Common environments for this compound include automotive, construction equipment, and fluid power.

This item is sold individually under part number QH70431. Unit weight is approximately 20.531 g and nominal inside diameter is listed as 5 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.