Originally it was a cage nut but all it is a 1/4 inch thick piece of metal caged in a bracket. I think it was built like that for clamping pressure.
Plush it has to move to adjust hinge
I will find a picture of this part .so you can see what it looks like Look to buy heavy duty cage nut 3/8 fine thread.
Picture is not clear enough to really see much. Do you have a welder?
Last edited by sack; 02/25/2021 1:15 AM.