Originally Posted by
HillRider
That "centering screw" is not needed for dual pivot brakes. Assuming the pivots aren't dirty or binding, all you do is adjust the cable length to get a proper pad separation, center the caliper over the rim by hand and snug down the mounting bolt. If one arm is binding check it's mounting bolt to the caliper and/or lubricate the pivot.
I had to use it for mine and for the BR-4700 brakes on my son's bike. Perhaps you had direct mount brakes and/or everything was perfect already at the time you installed yours.