A lock bar assembly for use in a stacking file of the type separate first and second drawer modules that are connected to one another to form a cabinet. Each drawer module includes at least one drawer that is selectively slidable between an open position and a closed position. A snap-on connector allows two or more distinct lock bar portions to function as a single integrated lock bar for preventing simultaneous movement of the first and second drawers from their closed position to their open position. The snap-on connector simplifies connection of the lock bar portions.