Mounting the brake to the bike. in the center of the brake is what it does .
mounting or center bolt will do . they're part of the brake, each manufactures their own ..

single pivot brakes , its also the spring carrier in the front . and holds the brake together

double pivot its not, alone ..

there is a recessed nut made to fit the fork hole bore..

the bolt length is longer in the front brake , and short for the rear

by the way the brake you mount does not have to say Coda on it...