XCD39T03Z1P1+FJDP1Circular aviation connectorShell No. 39, hole size 40.5mm, 3-core pin/socket, spring-loaded socket, smooth insertion/removal, good contact performance, no sparking, chemically plated nickel finish, shielded, no noise interference, plug with wire clamp tail cover, waterproof, commonly used for power carts, shipyard power equipment, and current transmission.