In extreme cases, use a hammer to hit the hex wrench. Pour a few drops of household oil or spray a little aerosol lubricant on the screw head, the screw head will not be loosened by additional tools. Before attempting to disassemble, let the lubricant work between the threads for 20 minutes. The application range of bolts and nuts includes: automobiles, construction, electronic products, mechanical products, digital products, electrical equipment, electromechanical products. Bolts and nuts are also useful in ships, vehicles, water conservancy projects, and even chemical experiments. In short, bolts are used in many places. Precision bolts for special digital products. Micro-bolts such as glasses, watches, and electronic products; general-purpose bolts such as televisions, electrical appliances, and furniture; large-scale bolts and nuts used in engineering, construction and bridges; transportation equipment, airplanes, trams, cars, etc. are equivalent to a combination of large and small bolt .
