yeh its an m8, but on the end of the bolt its thinner and has no thread, then the thread start and it has a washer attached to it aswell so i didnt think i could use just a standard nut and washer? if i can tell me now lol plus i went to bursons and used their things on the racks to see which size it was, it fit on a M8x1.25 but was loose but on the M8x1.0 it would only go about 2 threads in then get tight, so i dunno what I'm going to do?