What I can tell you is that it's a bolt from an old wooden box car, circa 1920. I had at orange heat to cut on the hardy. I hit it once turned it a quarter turn, hit it again, quarter turn hit it again and it sheared off. I flattened and punched one end fine but when I went to drift it split out. So I tried drawing one end and it frayed. Dull orange sparks on the grinder. Heated and quenched it and it bent over the anvil, no cracks. Any ideas?