Bi-metallic lugs are specialized connectors that are designed to connect two different metal conductors—usually copper and aluminum. They are made from an aluminum barrel and a copper palm that are joined together through a method like friction welding. The aluminum barrel is employed to terminate aluminum cables, while the copper palm is attached to copper bus bars or terminals. T... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php