Q-434 BUNA 70 Q RING

APG stocks the QH70434, an AS568-434 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 5.6 in (142.24 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.15 in (156.21 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

The compound resists petroleum-based oils, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life. The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.

You will find this material specified across hydraulic and pneumatic systems, automotive, and general industrial maintenance.

This item is sold individually under part number QH70434. Unit weight is approximately 22.188 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.