-166 BLACK BUNA 90D O-RING

This o-ring is supplied in AS568-166 black Buna-N (Nitrile) 90 Shore A measuring an inside diameter of 6.737 in (171.12 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 6.943 in (176.35 mm), catalogued under part number H90166. It compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is known for low compression set under sustained load, reliable performance in both static and dynamic service. Expect good resistance to petroleum-based oils, propane and butane, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in strong acids or polar solvents.

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

Stocked as H90166 and sold individually. Unit weight is approximately 3.9768 g and nominal inside diameter is listed as 6 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.