Dug this up today I am sure it's a cap of some kind probably from a old tractor there's words cast on the back I can only make out some of the letters I think it's auget spaped I know I am missing one letter
Don't know what it could be - maybe someone else has seen an object like this & can help you - anyway congrats on your find and thanks for posting your pictures and story for us & I wish you many more great finds while out dirt fishing.