Anyone recognize what this is? I think it is made of lead but I'm not sure. It has the same design on both sides, shown in pics, but it has different numbers or letters on both sides. My best guess is a type of fuse, either electrical or thermal melt point. Some water sprinklers use a melting trigger/fuse but this was found far out in the country at an early homestead site which had a modern house on it up until the 1980's. This item looks to be pretty modern, well into the 20th Century. Possible clue: On the same property I also found an electrical ground block, used to attach the ground wire from an electric meter, ect, to a ground rod. At first, I thought the designs looked like threads from a bolt but they are straight across and not angled.