There are a variety of systems to facilitate the automatic contribution of screws, nuts, washers, rivets ... may be:
Only dispensers, which position the screw to be taken by the operator one by one.
which counter, deposit a variable and programmable number of screws in the hand of the operator.
Automatic feeders, which by an external signal, position one or more screws / nuts on the automatic screw machine one or more spindles.