A rotary latch closure comprising a housing with an actuating shaft which is mounted so as to be rotatable, but axially fixed therein. The rotary latch closure has, at its free end, a circumferential thread, at least one axially oriented flattened portion, and a rotary latch configured to be fitted to the free end of the shaft so as to be fixed with respect to rotation relative to it in at least one rotational position and which is axially supported on a nut which can be screwed onto the circumferential thread. The nut is enclosed by a cage forming a laterally accessible space that is bounded by two walls, each of the two walls having a prismatic opening, wherein the opening allows the shaft to be slid through in a torsionally rigid manner.