help identifying these two items - civil war relics or not?

[pulltabfelix]

1st one was this big screw. Looks old, threads are kind of strange. On the rim of the head it has the Letters U S F and a triangle.

Any idea what this is? Civil War? There is a railroad about 100 yards from where I found it.

the 2nd find was a log with a signal in it. So narrowed it down with the detector and pinpointer. Use my Lesche to pry open slab of wood. At home I used a chisel to pry off more wood to expose the bullet. Looks like buckshot.
The wood was full of hardened sap.

Any Civil War bullet or shot would be that size?


update: the screw spike is modern made by United Steel and Fasteners founded in 1975.

 

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