That's what screwfix calls them. Is there another name?
I need something like that for a curtain rail: machine screw end into the rail holder and dowel thread into the wall.
Unfortunately the one supplied has about 15mm protruding, which means that when you deduct 12mm for the plasterboard, 2mm for the plaster, and 1mm for the paper, there's nothing left to go into the noggin beneath!
Can I get any longer ones anywhere? Google seems to point me back to screwfix ;(
TIA