I'd say that those are just plain wrong. They would certainly interfere with a quality plowing job some, if not all of the time. Odds are those originally used #7 head plow bolts. See if you can find a part number on the back of the moldboard.
If it's destined to be a yard ornament, leave them be, but if you're going to (try to) use it, take at least one out and look at the hole. Whatever they should be, they should be flush with, or very close to flush with the moldboard, and these bolts don't appear to be close.
Some suppliers sold a universal replacement moldboard in a variety of sizes that could be fitted to most any plow. The holes had to be punched out to match the frog, some grinding/finish might neeed to be done to the edges, etc.. If nobody recessed the holes for a plow bolt with a tapered neck and simply punched the holes out, a bolt like these would be the only way to hold the moldboard on.
Strange things also happened during WWII. I've heard of people rebuilding ignition points, rebuilding leather oil seals, and alot of other creative repairs done because parts/supplies simply weren't readily available at the time. Hex head bolts weren't really popular then, but it could be possible these were the only bolts someone could get their hands on at the time. I would guess this was done later, though.
AG
This post was edited by AG in IN at 19:17:28 08/16/13 3 times.
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