Abstract: A pin member (1) for electrical connectors of the pin and socket type comprises a cylindrical hollow metal body provided with through slots (4) in the cylindrical surface thereof. The slots are inclined with respect to the longitudinal axis of the body. The body is permanently deformed by twisting it a predetermined amount in a direction opposite to the inclination of the slots (4), causing an outward expansion or bulging of strips defined (8) between adjacent slots to increase the outer diameter of the hollow cylindrical body at intermediate portions of the slots.

Abstract: The socket member for electrical connectors is obtained thanks to permanent deformation by twisting of a cylindrical sleeve of suitable metal, provided with through slots (2) arranged on its cylindrical surface and inclined with respect to the longitudinal axis of the sleeve. Each slot, previously to its twisting deformation, presents a transverse profile with sides (102, 202) diverging towards the exterior, and said sides meet at the ends of the slot forming curvilinear edges (302, 402) in such a manner that the vertices of said edges located on the inner surface of the sleeve are nearer to each other with respect to the vertices of the edges located on the outer surface, which are farther from each other.