Fitting for fixing a threaded element to a wall section

A fitting for fixing a threaded element to a wall section, comprising a base body which is penetrated by a recess, which recess is extended along a central axis, further comprising a clamping ring which is mounted on an outer surface of the base body and which is rotatably movable with respect to the outer surface, wherein a cam is assigned to the outer surface of the base body or to the clamping ring, which cam effectuates a change in diameter of the clamping ring during a rotary movement of the clamping ring relative to the base body, wherein a coupling part is movably received in the recess and forms with the base body a rotary coupling for a transmission of a torque between the coupling part and the base body about the central axis, wherein a threaded portion of the coupling part determines a thread axis, wherein the coupling part is accommodated in the recess with a variable orientation of the thread axis within a predetermined angular interval and/or within a predetermined distance interval to the central axis, and

• wherein an outer surface of the coupling part defines a first circumferential profile in a plane perpendicular to the central axis and wherein an inner surface of the recess defines a second circumferential profile in the plane perpendicular to the central axis, the first circumferential profile forming with the second circumferential profile the rotary coupling for the transmission of the torque between the coupling part and the base body in a functional position, wherein a relative movement between the coupling part and the base body with at least one geometrically limited rotational degree of freedom and/or at least one geometrically limited linear degree of freedom of movement is enabled in between a release position and the functional position for the coupling part and the base body, and
• wherein the first circumferential profile comprises round recesses and the second circumferential profile comprises round projections, the round projections of the second circumferential profile being disposed within the round recesses of the first circumferential profile, whereby the first circumferential profile substantially matches is geometrically similar to the second circumferential profile.