Originally Posted by Gratefuldiver
That helps, looks like the M6 hex are 20mm and the M8 with washers are a little shorter. That would be easy enough. How critical do you think the Flag Bolts and stiffners are to the install or do you recall if something else could work in that step of the install? These will be purely for looks.
Ive build a couple muscle cars from the ground up so I know I can make it work, but I also know the pain of making something work, if you know what I mean. LOL
I did NOT do the install myself and do NOT do automotive work so my opinion should probably be taken with a grain of salt...
However, I would think, if you're using these for looks only, the flag bolts and stiffners aren't critical but the flag bolts are the only screws that attach the bottom of the rails to the Jeep. All the other bolts are on the side. However, there's probably a dozen bolts spaced every 4" or so on the sides of these things so that's going to provide the majority of support for the rails. I guess my only concern would be that not installing the flag bolts could somehow impact the structural integrity of the vehicle since these rails replace the part that's there.
If you're relatively good with cars and feel confident on getting the M8 and M6 bolts, I'm sure you could figure out something to replace the flag bolts if you felt it was necessary after install. However, all this is up to you. Maybe check out the install video that one of the members did here if you haven't already. He provides a lot of good detail and you might be able to assess the structural risks of not having all the parts.