I was trying to put a new seat on my Ford 3000 and noticed when I removed the old one that the rear bolt did not have a nut. Upon closer inspection the threads appeared to be damaged, so I decided to replace it. The old "bolt" was difficult to remove and required the use of a pipe wrench. The "bolt" was much more complicated than I expected (see attached photo) and I now realize that it is technically a plunger guide pin (C5NN669C) and has something to do with draft control. It looks like it doesn't do much. What would happen if I just used a regular 7/16 inch bolt in this hole to anchor my new seat? Or do I need to replace it?