RBC Bearings Inc., a leading international manufacturer of highly engineered precision bearings and components, closed on the acquisition of the Sargent Aerospace & Defense business of Dover Corp. Tucson, Ariz.-based Sargent is a leader in precision-engineered products, solutions and repairs for aircraft airframes and engines, rotorcraft, submarines and land vehicles. The company manufactures, sells and services hydraulic valves and actuators, specialty bearings, specialty fasteners, seal rings and alignment joints, and precision components.