I'm working on the hinge pockets on a 56 Chevy truck and I need some of the little brackets that hold those SQUARE PLATES that are used as floating nuts. I don't know the name of the locating bracket clips so I can't order some. I also don't know a good source for them. Any ideas ?
Fastenal has 'em: https://www.fastenal.com/product?query=cage+nuts&fsi=1 McMaster Carr probably sells them too.
those caged nuts you can buy, the cage is not large enough to let the nut move around as much as it needs to, to adjust the door on a 55-59 truck. I seem to recall making a few new cages for mine....but it's been a while.