“…Such attach hardware as bolts, studs, U-bolts, etc., is extensively used in the modern machine engineering. The purpose of the modern stage of hardware production development is to increase the quality of the initial rolled metal and the items made of it and to increase their performance, reliability, and service life [8,9], thus ensuring secure further operation of a particular item [10,11]. In attach hardware production, the rolled metal, designed for cold die forging, shall have a clean and shiny surface, free from scale, fat and other contaminants, and contain process grease well attached to the surface.…”