Hainan Steel tells you: Steel installation inspection requirements for border element

Convergence of high-strength steel hexagon bolts convergence deputy, torsional shear type high convergence deputy, steel grid with high strength bolts, common bolts, rivets, self-tapping screws, rivet, nail, riveting bolt (mechanical type and chemical reagent type), anchors and other standard parts and fastening nuts, washers and other standard accessories, the species, size, performance should be consistent with existing national product standards and design requirements. High strength large hexagon head bolts convergence deputy and torsional shear type high convergence deputy factory inspection reports should be tightened with a torque coefficient and axial force (pre-tension) were with me. Hainan Steel