Cold Digger asked me to try to ID his finds.
The small lead object with US looks like it MIGHT be an unusual variety of "lead seal" (a piece of lead which gets crimped across two iron wires closing the neck of a cloth bag or a bale). Most of that type of "lead seal" are round, whereas Cold Digger's find it square. The photo of it shows what looks like stubs of wire protruding from one end of it. That's my "best guess" about its ID... I'm not certain about it.
The small object which somewhat resembles a screw looks to me like a brass (or copper) rivet... commonly used to connect two thick pieces of leather. Being found in a hay field, it was probably from a horse or mule's leather plow-harness or wagon-harness.
I agree with DCMatt that the object at lower left in the photo is a bucket's "bail"... the socket for a bucket or pail's thick wire handle.
As Ekeisler suggested, the large curved brass object does very closely resemble a piece of the brass ring which fit around the base of a rare variety of civil war yankee navy Parrott artillery shell. But despite the close resemblance, I'm certain that's not what it is. The artillery shell brass ring fit into a wide V-SHAPED groove in the shell's iron body... and Cold Digger's piece of brass isn't the correct shape to fit into that groove. Also, if it is from a fired artillery shell, it would have rifling-marks from the cannon's barrel on it... but the photos don't show even a slight trace of rifling-marks on it.
I do not recognize what the L-shaped brass object and the large lead object are.
