A lamp coupling is a short fitting that is threaded with two female ends to enable the connection of two separate pipes or rods.

[1] It is typically used for a variety of applications such as connecting two different types of pipes, rods, or cables, or for joining two pieces of a lamp together.

[2] Common types of lamp couplings include straight couplings, straight lamp pipe couplings, and adapters, barrel, brass, hex head, hexagon rod, and both regular and large knurled couplings.

[3] Available in several sizes and thread configurations, lamp couplings are typically made of brass, nickel-plated brass, or aluminum.

They can also be found in a variety of finishes, such as unfinished brass, black finish, and polished nickel finish.