Abstract: A terminal spring on a female terminal that integrates a terminal spring spacer to underlying terminal bases of said terminal spring to aid in maintaining proper contact interface gap for receiving therein a corresponding male terminal. The terminal spring spacer is integrally, contiguously, or unitarily connected to said terminal spring as a single piece. The female terminal, onto which the terminal spring with the terminal spring spacer is joined, includes a pair of terminal bases, each having a contact zone, a transition zone, and a terminal (wire) zone. The contact zones and transition zones of the first and second terminal bases are substantially contained within the terminal spring. The terminal spring spacer effectively maintains a correct gap through an interface gap between front ends of the contact zones of the first and second terminal bases through another gap between transition zones of the first and second terminal bases for accommodating therein the corresponding male terminal.