Abstract: A circuit breaker system having load and line terminals interconnectable with load and line conductors by way of a solderless collar has a central opening which encloses an overlapping portion of the internal load or line terminals and the associated load or line conductors. The collar has a set screw in the top thereof which is turned down on the overlapping terminal and conductor until a secure connection is made. The collar has a joint, which may be affected by the setscrew action associated with securing the external conductor with the internal terminal. The joint is T-shaped and is provided with vertical tabs on one portion thereof to prevent the weakest portion of the joint from rotating outwardly under the affects of the securing action and thus jeopardizing the strength of the joint.