I finally made it out today after a long winter freeze. I found a few interesting relics. The shutoff valve has me wondering how old it is. The shotgun shell head stamp dates from 1892 - 1902, and the carr fastener went on an old Model T radiator snap cover. Thanks for looking!
Hello Tony in SC its definitely brass. Internally threaded, and the makers marks or numbers / letters?.. Maybe 1907? Thanks for your input. I figured someone on T-Net might be able to pinpoint this.