you mean, the threads of the bolt are striped, or the head of an Alen type bolt is "round" already?
the head of an Alen type bolt is "round" already.
Are you talking about the centering adjustment for the pads? Just loosen the pivot-bolt nut on the back of the fork/seatstay-bridge, center the brakes and hold steady while you tighten the nut in back.
Um, I dont mean to disagree, I will try that. But why on earth would they have that adjustment if all you had to do was adjust the pivot-bolt nut on the back of the fork bridge?