HARTING 21348889487100 is a part number used to identify a series of HARTING circular connectors. This series is mainly used in aviation, military, and rail transport applications. The connectors offer a robust and durable connection that can withstand vibration and shock. They offer a wide variety of contact configurations and have a locking system to ensure that the connection is secure. The series is designed for a variety of media, such as EMC applications and for power up to 16A.