RWMK friction coefficient measuring heads offer as multicomponent transducers the possibility of simultaneously recording the torque, axial clamping force on the screw connections and the frictional torque on the screw head or thread. In doing so, a high degree of measuring certainty is achieved as the three signals are optimally decoupled from each other thanks to the design of the multicomponent transducer. Together with the large nominal sensitivities on all three channels, extremely fail-safe signals are achieved.