Q-171 BUNA 70 Q RING

APG stocks the QH70171, an AS568-171 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring with an inside diameter of 7.987 in (202.87 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 8.193 in (208.1 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists petroleum-based oils, greases and lubricants, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or automotive brake fluid will shorten service life.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, agricultural equipment, and construction equipment.

Order part number QH70171, sold individually. Nominal inside diameter is listed as 8 inch. Review your operating media and conditions against this specification before installation.