If nobody suggests anything better, what about purchasing some copper rod from a certain auction site & thread it to suit?Anyone recommend a supplier of replacement screw in soldering iron tips?
The current tip has an M4 X 0.7 thread.
I made one threaded M4 a few weeks ago, possible the thread was too long, used it once then the lidl iron died. Can post it, if you want?
Both copper and brass will be slowley eaten away by the solder and flux. Ideally make it from copper and braze a thin peice of mild steel on the tip. Proper ones will be iron plated on copper.