Been searching everywhere for the bolt size but have only come up with 12mm x 145mm not sure if this is correct? I am installing a upr k member this weekend and know the rack to k member bolts are too long for the upr and like a idiot I forgot to bring the bolts to work with me today to stop at hardware store on the way home. I thought I could find the right size on the internet in a couple of mins but that isn't working out to well. I am hoping one of you guys knows the right size. I am just trying to save myself two trips since it is my last day at work this week. Thank you to anyone that knows the answer you will be helping me out a lot.