Normally just a standard hex head bolt. likely metric. I would use a grade 8 and pay close attention to torque specs. I would re-torque several times on tires that are going to be left mounted long term.Im new to beadlock wheels and didnt know that just any "ordinary" bolt that size would work
I would think the torque rating from the wheel manufacture would be for supplied hardware and the tapped holes, but as DeeYoh said it would have to be a very soft bolt to lose the battle to an aluminum wheel (unless its a very deep tapped hole). I just thought they would use stainless for corrosion issues.Are there special torque type bolts that can handle the pressure of being torqued, or are they all the same?