Put the running board bolts back in. That's how FJ's arrive from the factory. Mine came with running boards that I had them remove and trade for Rock Rails...they swiped my bolts...had to go back and get them as leaving the holes open would not be good. If you have already gotten rid of the bolts, buy a new set from Toyota or get a set of stainless steel bolts at any decent hardware store. Most of the fasteners, I've found, are common thread pitches and diameters...available almost anywhere.
Resurrecting an old thread. I don't have running boards, but do have what some folks have called "Predator steps/rails" (They were on my 2007 when I purchased it in Oct, 2014). These appear to be bolted to the body, not frame mounted. I'm debating on pulling these off and possibly having them Line-X'd or if I want to instead do some kind of frame mounted rail.
If I pull them, I'd like to get new bolt hardware to replace them, as mine are pretty rusted up. Looks like from looking online, the upper bolt is part # 9008010083 and the lower bolt # is 90119A0062 (please correct if those are incorrect). Problem is that none of the local dealerships have these in stock, and shipping from other places may cost more than the parts.
I can try and take the removed bolts into a local hardware store, but was wondering if anyone had the exact specs on these bolts, that I could use to find them at a local hardware store? I may just opt to have the dealer order them for me depending on whether they charge shipping or not.
Update: I have removed the steps, after spraying down the bolts with liquid wrench last night. Came off fairly easily, and I cleaned the bolts with some Hoppes #9 (yeah, I use that stuff on everything ) and then put some anti seize on the bolts and replaced them.
Going to leave the steps off for now, kind of liking this look. May list them on Craigs List and get some real sliders at some point.
Also, do these thread into tac welded nuts in the body like I have heard they do on the frame? Trying to make sure I don't cause any major issues when I try to remove these. I have sprayed them down with some liquid wrench, but again, would rather not damage anything if I really start to wrench on these.