Q-217 BUNA 70 Q RING

QH70217 is an AS568-217 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 1.171 in (29.74 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.449 in (36.8 mm). In service, this quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) is specified for strong abrasion and tear resistance, reliable performance in both static and dynamic service. The compound resists many alcohols, propane and butane, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or polar solvents. The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

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

Reference part number QH70217 when ordering; the item is sold individually. Unit weight is approximately 1.2218 g and nominal inside diameter is listed as 1 3/16 inch. 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.