Here are the pictures you requested of the piece my dad found that resembles a fuse. But it is completely iron. It was found in the same vicinity of the rare fuse underplug I found. Please help. Thanks!
Although it fairly closely resembles an artillery shell fuze, at this point I think it's not a fuze, for four reasons:
1- Only one version of civil war fuze had an iron body. That was an extremely rare "early" model of Schenkl Percussion fuze.... which did not have a "head" or "lip" encircling its top. The object in the photo has a "head" or "lip." However, because nobody knows EVERYTHING the Confederates came up with due to the shortage of brass in the Confederacy, let's set aside reason #1 for the moment, and deal with the other reasons I don't think it is a fuze.
2- Your photos do not show any threading on the iron below below the wider "head" or "lip." Do you see any threading (or remnant of threading) there when you examine it in real-life?
3- If its body had threading, there SHOULD be some type of wrench-slots (or two small round holes 180-degrees apart near the large hole) on the "head" or "lip," for using a fuze-wrench to screw the fuze into the shell. You might need to clean the flat top of the object, because rust-crust might be hiding some wrench-slots or holes.
4- The hole through it looks too small to hold a paper-timefuze... whose top was very slightly less than 1/2-inch wide and its body tapered down to about 3/8-inch wide.
Please let me know whether cleaning turns up some threading on the body below the "head," and wrench-slots on the head's flat top.