metric threads most likely..........go to lowes and check out hardware bins....also look for grade 8 rated hardware ask for help from hardware department about hardware grading system...it is all about shear strength of hardware.also fastener rating is primarily for NC or NF thread stength-Metrics are handled little differently.....Go to other jeep sites and do your research on this issue.....Do not go Cheap!!
Also hardware bolts are cut a little differently.....auto motive fasteners have taper incorporated where as fatener is installed it will get tighter against thread bore.....hardware fasteners do not have this....you will need to have loctite red or blue threadlocker sealant on mounting threadbores and threads.
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