<p>The box has a clamp (40) for locking a partition and a screw (16) for controlling the pivot of the clamp between a retracted position and a release position. A side wall of the box includes a window (12) whose dimensions are adapted, such that the clamp passes between the two positions, where the window extends along a transversal direction from an edge to an edge (22). The edge (22) forms a stop for the clamp in the two positions. An independent claim is also included for a method for fabricating a fitting box.</p>
