Hi. I'm wanting to restore an old lamp shade I found into a functioning pendant lamp. Does anyone know what these large, threaded lamp shade fitter/socket combo parts are called? I can't seem to find them anywhere.
Here's the ebay listing I found the part on.
https://i.ebayimg.com/images/g/cpcAAOSwu3Rcvjwt/s-l1600.jpg
Much thanks.

Here's the ebay listing I found the part on.
https://i.ebayimg.com/images/g/cpcAAOSwu3Rcvjwt/s-l1600.jpg
Much thanks.