A measuring device comprises a sensor module and an evaluation module mounted on the sensor module. The sensor module includes a first component having a first screw thread, and the evaluation module includes a second component having a second screw thread. The screw threads engage with one another by screwing; wherein the first or the second component has a slit, which essentially extends into the component in a plane perpendicular to the thread axis; and there are formed by the slit a first clamping limb and a second clamping limb of the component, which are separated from one another by the slit. On the component there is furthermore arranged an actuating element, which acts on the first clamping limb and the second clamping limb, and deflects the clamping limbs relative to one another, whereby the first screw thread and the second screw thread are clamped against one another and secured against rotation relative to one another.