Anchoring screws in a lamp

Been there done that. Filled hole with 24 hour JB Weld. Put a sleeve around broken parts and added more JB. Before taking JB out of tubes to mix I warm the 2 tubes with a heat gun (careflly) This makes it more fluid and will fill hole. Next day drill and tap in threads for proper hole size for screws. WW

The repair suggested by WW is worth a try.

Otherwise, I'd try drilling & tapping the remaining boss and using a small diameter machine screw.

cheers Bob

I have a plastic repair product that I used when I was repairing a lot of consumer electronic items. I got it from the local electronic supply house years ago. It is a fine plastic powder and a solvent that when mixed in the proper ratio will produce a plastic putty or paste and will be much like the plastic part being repaired when it sets up. I couldn't find the original online but I came across the same thing here:

What everyone else has said is exactly what I would say.

A big thank you to everyone for your suggestions and comments. The lamp is now back together and working.

Also, special thanks to BobK for introducing me to the proper word for a molded socket: boss. (Do most DIY folks recognize that word or just mechanical engineers?) Bob

and re-assemble(gently).