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The article presents the results of the application of the developed complex criterial approach for evaluating the production processes of fasteners such as bolts with hexagon head. An estimation of two technologies for manufacturing bolts was made, based on the criterial evaluation, the most rational production variance was selected. Developing multi-operation processes for forging details of complex shape, it is necessary to take into account a large number of factors affecting the efficiency of processes and the quality of products. The calculations used do not always allow to determine with high accuracy and reliability rational parameters and deformation regimes, which leads to the need for experimental forging and technology adjustments. At the same time, the search for rational technology largely depends on the experience and intuition of the designertechnologist. It should be noted that the results of calculations of individual parameters of deformation processes (deformation force, stress-strain state parameters, plasticity resource, etc.) do not allow to comprehensively evaluate the efficiency of the technologies being developed as a whole. A technique was proposed for the search for a rational technology for manufacturing complex-shaped articles using multi-operation processes of plastic deformation on the basis of a complex criterial approach [1]. Further development of the technique is reflected in article [2]. According to the developed method, several variants of possible technology with different regimes and form-change at the individual transitions are first determined. Then, using modern methods of full-scale and computer modeling of forging processes, the main parameters (stress-strain state, energy-force parameters, stability parameters of the stamped billet, plasticity resource, product quality, etc.) are determined for each technology variant. For each parameter, its criteria is defined:

Application of the criterial approach for the choice of forming technology for rod fasteners