Seat belt mounting plates for vehicles which didnt have the plates from the factory (basically anything that came out for the factory without windows in the back!).
These are reproductions of the original plates and would originally have been welded in place.
There are 2 holes in the body for the lower side seatbelt mount... either can be used. Plate has 2 threaded nuts, use one to bolt the plate in place using a 7/16 UNF bolt and washer (see related items). The belt attaches to the other.
There are dimples in the body that line up with the notches in the ends of the bracket.
Once bolted in, no further welding is required, although you could of course weld them in place too.
Plates are laser cut, welded, and zinc plated. Each plate has 2 threaded mountings, and the plates are handed.
This is the LEFT side or Nearside on a UK vehicle.