Standard nickel push thru sockets have Uno threads and a nickel plated shell and cap with set screw. Replacement nickel push thru sockets have a simple push thru button to turn lamps on and off. Push thru nickel sockets work well in restoration of older nickel or silver lamps. Tapped 1/8 IP nickel push thru sockets fit standard lamp pipe and use standard base light bulbs.
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.