Had found several of these on a sifting site dating to the 1840s. Was a blacksmith shop then a third Seminole war camp and then a general store site in the 1860 to 1880 period. They look like threads you see on screws but I question this attribution as they are all cut and without a beginning point. They are brass and I might add that this site has had no screws or screw heads found at. Thanks for any help you can give.