AD-81P Coin Acceptor hanger bolts

[Tiktaalik]

So it turns out I wasn't looking very closely and I bought a AD-81P coin acceptor on ebay that didn't have the four bolts installed that are used to hook the coin acceptor to the cab's mounting hardware.

Does anyone know what these sort of hanger bolt things are? Can I get them at any hardware store?

I might have to find another coin acceptor if it's some odd proprietary thing.