Abstract: The present invention relates to a pivotal attachment means intended for attaching an object to a supporting surface and comprising a lower attachment part (1) which is intended to be fastened to the supporting surface and which includes an outwardly projecting part (9) configured with a central dished recess (10) and a surrounding screw thread (11), and an upper attachment part (3) including an attachment plate (4) which is intended to be fastened to the object, a spacer bolt (5) which projects out from the attachment plate, an attachment nut (6) which is placed around the spacer bolt and which is firmly screwed to the outwardly projecting part of the lower attachment part and is provided with an inwardly projecting edge (16) having a dished chamfer or bevel (17), and a spherical body (7) which is attached to the outer end of the spacer bolt and which is positioned in the space between the lower attachment part and the attachment nut.