1963 galaxie body to frame fastening?

just looked under my country sedan and noticed there are no nuts on the body to frame mounting bolts so i have a couple of questions.
1: is there any nuts supposed to be on these and what size are they?
2: if not how do the hold the body to ch***is ?
thanks for you help on this problem

 

If memory serves me correctly, the nuts are integrated with the washers. You unscrew the bolt a couple of turns and then hit the head of the bolt with a hammer, that will cause the washers to unlock.

 

If you take out one of the mount ***emblies you'd have the answer to your question...

The frame mounts consist of an upper and lower rubber doughnut, and an upper and lower hat-section steel bushing that fit inside these doughnuts.

The lower bushing is more of a witch's-hat, where the vertical sleeve is swaged down to a threaded section. When you tighten the bolt into the threads of the lower section it pulls up through and snugs into the upper steel section. If the body and frame aren't perfectly flat to each other (typical of old Detroit welded-asemblies-of-steel-stampings) you'll find shims between the upper hat and the body on some of the mounts.

This also means that to REMOVE the mounts you need to loosen the bolt about five turns, then hit the bolt with a hammer to dislodge the lower mount hat from the upper one.

If the threaded section of the lower hat is loose or weak you can use a longer bolt, a nut and a washer to hold it all together but this requires (depending on the specific mount) a fully-threaded 3/8 or 7/16in bolt (and if memory serves they're UNF - fine thread.)

In the US McMaster-Carr used to stock fully-threaded Grade 8 bolts in those sizes (back when I bought them for my '64 Country Sedan), but I don't recall seeing them in their listings lately.

 

Thank you both very much, I think you can guess this is my first car so expect some more stupid questions lol