Maybe I am using the wrong term for the nut which is very stiff to turn. This is what GMC put on the trucks. The 47 pick up was hard to get a pic of the nut but you can see it matches the nut which I am holding in the next pic. That came from the 47 panel as did the rest of the parts pictured. The 48 is not here but I am positive it has the same nuts holding it together. I am sure the nylock nuts will work. I guess I assumed that everybody keeps, catalogs and saves these parts like I do
1947.2 GMC 1/2T SWB panel 1947.2 GMC 1/2T long bed 1948 GMC 1/2T short bed
