It is impossible to build a safe product without comprehensive theoretical knowledge in the field of material engineering, the behavior of screw joints under mechanical and chemical stress, without knowing the specific operating conditions under which the future structure will work etc., etc. Seemingly the simple part, as a screw, is actually a demanding structural element, whose unquestionable function is to connect.\nThe book „Fascinating story about threaded joinigs“ provides theoretical foundations and practical experience in the field of mechanical joining of parts. It is intended primarily not only for designers and students of mechanical engineering. It is also of interest to assembly workshops, sellers of connecting materials, and designers of structural units with bolted joints.