Q-118 BUNA 70 Q RING

QH70118 is an AS568-118 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 0.862 in (21.89 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.068 in (27.13 mm). In service, this quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Expect good resistance to petroleum-based oils, hydraulic fluids, and greases and lubricants. Buna-N (Nitrile) is specified for low compression set under sustained load, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in strong acids or automotive brake fluid. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

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

Reference part number QH70118 when ordering; the item is sold individually. Unit weight is approximately 0.547 g and nominal inside diameter is listed as 7/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.