Standard turn knob sockets have solid brass shells and caps with set screws. Turn knob lamp sockets are tapped 1/8 IP and fit standard lamp pipe. Brass lamp sockets along with our other assortment of lamp repair parts make builing or repairing lamps an easy task.
Before making any changes to electrical fixtures and lamps:
Disconnect plug/wire from the electrical source.
Turning lamp off will not protect you from electric shock.
If you are unsure how to safely proceed contact a licensed electrician.