Q-176 BUNA 70 Q RING

Ordered as QH70176, this is an AS568-176 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring measuring an inside diameter of 9.237 in (234.62 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 9.443 in (239.85 mm). The quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

As a material, Buna-N (Nitrile) delivers low compression set under sustained load, reliable performance in both static and dynamic service. It resists petroleum-based oils, greases and lubricants, and hydraulic fluids. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or strong acids.

Common environments for this compound include agricultural equipment, hydraulic and pneumatic systems, and general industrial maintenance.

Reference part number QH70176 when ordering; the item is sold individually. Nominal inside diameter is listed as 9 1/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. 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.