High-Strength Hex Bolts with Enlarged Socket for Metal Structures GOST R 52644-2006

High-strength bolts with hexagonal head with increased size under the key, sizes from M16 to M30, accuracy class B. Strength class 10.9. Designed for use in metal structures used in construction (including - in the construction of bridges) and mechanical engineering, operated in all macroclimatic regions regardless of the category of accommodation