An electrical plug includes a support body, a pair of electrical contacts of elongated shape having respective longitudinal axes arranged coplanar on a common lying plane, and connecting members adapted to allow a mutual movement between said electrical contacts and the support body. The connecting members include a first rocker hinged to the support body according to a first hinging axis perpendicular to the lying plane, and a second rocker hinged to the support body according to a second hinging axis parallel and spaced with respect to the first hinging axis, each electrical contact being fixed overhanging a respective of the first and second rockers.