This report was produced as a part of the project EASYTRAC, an EU project under the programme Competitive and Sustainable Growth: Contract No. G6RD-CT-2000-00188, coordinated by UNIMETRIK S.A. (Spain). The project is concerned with low uncertainty calibrations on coordinate measuring machines (CMMs). For this project, the Centre for Geometrical Metrology (CGM) at the Technical University of Denmark (DTU) has taken care of thread measurements, in collaboration with the Dipartimento di Innovazione Meccanica e Gestionale (DIMEG) - University of Padova - Italy, Physikalisch-Technische Bundesanstalt Braunschweig (PTB) - Germany and Tampere University of Technology (TUT) - Finland. The present report describes feasibility and experimental results of a reversal and substitute element technique application for thread calibration on CMMs.