KD503 connectors have been industry requirement for over 30 years. This connector is silicon and used with two single core wires. KD503 connectors are Intertek certified to FAA AC.
KD 503 (Plug) and KD 503R (Receptacle) are packed and delivered in kit including all the necessary parts for making the assembly on secondary cable. Each secondary connector kit contains components for a plug or a receptacle.