*The nuts and bolts set are made of for Stainless steel with exquisite workmanship, high hardness, rust resistance, is not easy to break or deform during use, has strong wear resistance, is easy to disassemble.*Hex nuts and bolts set uses a hexagonal structure, which is stronger, and has a higher load capacity. The interface is tighter, the connection with the nut is stronger, the shock resistance is good, and some loosening problems are solved.*The threads are evenly distributed, the threads are deep and clear, is smooth and burr-free, the force is uniform, it is not easy to slip during installation, and the fastening performance is good.*Wide range of applications: widely used in construction, mechanical engineering, automobile manufacturing, furniture manufacturing, aerospace and other fields, for connecting bearings, gears, machine tools, couplings and other components, and for fastening and supporting building structures.*Package includes: total 500pcs, including nuts and bolts: 3x8mm, 3x12mm, 3x16mm, 3x20mm, 4x8mm, 4x12mm, 4x16mm, 4x20mm, 5x8mm, 5x12mm, 5x16mm, 5x20mm, different sizes are available to meet the needs of different areas.