A bushing assembly comprising: - a bushing element comprising a first surface, which is adapted to come into contact with a shoulder, and a threaded hole, which is adapted to be engaged by a screw; said hole defining a longitudinal axis; and - a cage element, which is at least partially fitted around said bushing element so that the bushing element is supported and is floating; said cage element comprising a first wall, which is transverse to said longitudinal axis; and a second wall, which extends orthogonally from said first wall and radially external with respect to said bushing element relative to said longitudinal axis; said second wall being provided with at least one first opening; said first opening defining an end abutment of said cage element; said bushing element comprising at least one stop portion, which engages said first opening with an angular clearance; said bushing element being movable around said longitudinal axis at least between a first angular position, in which said stop portion is spaced apart from said abutment, and a second angular position, in which said stop portion is in contact with said abutment so as to prevent, in use, the bushing element from rotating past said second angular position; said stop portion being defined by an appendage element, which is distinct from said first surface; wherein said first surface is circular and said second wall is cylindrical, characterized in that said second wall is adapted to be fixed to said shoulder. - a bushing element comprising a first surface, which is adapted to come into contact with a shoulder, and a threaded hole, which is adapted to be engaged by a screw; said hole defining a longitudinal axis; and - a cage element, which is at least partially fitted around said bushing element so that the bushing element is supported and is floating; said cage element comprising a first wall, which is transverse to said longitudinal axis; and a second wall, which extends orthogonally from said first wall and radially external with respect to said bushing element relative to said longitudinal axis; said second wall being provided with at least one first opening; said first opening defining an end abutment of said cage element; said bushing element comprising at least one stop portion, which engages said first opening with an angular clearance; said bushing element being movable around said longitudinal axis at least between a first angular position, in which said stop portion is spaced apart from said abutment, and a second angular position, in which said stop portion is in contact with said abutment so as to prevent, in use, the bushing element from rotating past said second angular position; said stop portion being defined by an appendage element, which is distinct from said first surface; wherein said first surface is circular and said second wall is cylindrical, characterized in that said second wall is adapted to be fixed to said shoulder. said cage element comprising a first wall, which is transverse to said longitudinal axis; and a second wall, which extends orthogonally from said first wall and radially external with respect to said bushing element relative to said longitudinal axis; said second wall being provided with at least one first opening; said first opening defining an end abutment of said cage element; said bushing element comprising at least one stop portion, which engages said first opening with an angular clearance; said bushing element being movable around said longitudinal axis at least between a first angular position, in which said stop portion is spaced apart from said abutment, and a second angular position, in which said stop portion is in contact with said abutment so as to prevent, in use, the bushing element from rotating past said second angular position; said stop portion being defined by an appendage element, which is distinct from said first surface; wherein said first surface is circular and said second wall is cylindrical, characterized in that said second wall is adapted to be fixed to said shoulder.