This paper shows some of the results of the measurements of friction coefficients in stainless steel threads. Three different coatings of the used nuts are considered and tested under various axial loads. The friction conditions for coated standard nuts of M12 and M16 size were measured on a simple test stand. The resulting friction coefficients are plotted with respect to applied load for and pressure in the thread. The results are discussed in detail. © Experimental Stress Analysis - 56th International Scientific Conference, EAN 2018 - Conference Proceedings. All rights reserved.