Socket, bracket, pigtail and spring. Fits single-filament bulbs with one contact point on the bottom like 67, 1141, 1156 and 1383 bulbs. Overall dimensions of this socket and bracket are 1" x 1" x 5/8".

This bracket is often used to repair 1970s and later Airstream over-door porch lights.

Note: like most bayonet sockets, this socket is grounded through the socket and bracket. The lead coming off it is positive to energize one filament or function.