Please don't throw it away. It is definitely a blown-out civil war Hotchkiss Percussion Type 2 artillery fuze. That version was first manufactured in early-1863 and was used in tens-of-thousands of shells until the end of the war.
For anybody here who doesn't already know... the term "Percussion" in this fuze's name means it is an impact-detonation fuze. It was designed by civil war artillery Ordnance inventor Benjamin B. Hotchkiss, of Sharon Connecticut, who got two US Patents for its design, in 1862 and 1863. Some (but not all) of these fuzes have his last-name and "patented" and the patent-dates marked on the fuze's flat top.
Speaking of which... here are some photos which show what a civil war Hotchkiss Percussion Type 2 fuze looks like in intact, undamaged condition. Its body its made of brass. It has a screw-in brass plug in its flat top. The fuze's small brass "safety-wire" is showing in the hole in its base, but your blown-open one is missing the wire, of course. The dug one in the photos was found at the 1864 Nashville battlefield, near where you live, Coily Girl.