820PC Stainless Steel Screw Kit with Wrenches: Rust-Resistant Assortment ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Perfect Combination Set There are a total of 820 pieces of 304 stainless steel screws and nuts sets in 3 sizes: M2, M3, M4. The set includes matching nuts, flat washers, and spring washers to meet different needs. These sizes cover almost all common applications in everyday life, including precision machinery, scientific instruments, electronic products, household appliances, communication devices, locks, lighting, toys, and more. High-Quality Material Made from 100% 304 stainless steel, these screws and nuts are rust-resistant and corrosion-proof, ensuring durability over time. Crafted using advanced manufacturing techniques, they feature a smooth, burr-free surface for a clean finish. They are sturdy, eco-friendly, and built to last. Convenient and Thickening Box Our set comes in a convenient, thickened box that keeps your screws and nuts organized. It contains 27 different types of bolts, nuts, flat washers, and spring washers arranged in 24 labeled grids for easy identification. Plus, we include three free wrenches to help you get started?no additional purchase needed. 1:1 Matching Lock Washer To enhance the security of your assembly, this set features spring washers that prevent bolts from loosening. Nuts and flat washers increase contact area and reduce stress, protecting your screws and components. Welcome to LUKAISEN Hardware! Explore our exclusive deals and enjoy additional discounts at the LUKISAN Store! Happy fixing and building! Model: Metric Screw and Nut Assortment Unit Quantity: 820PCS Material: Stainless Steel,304 stainless steel,anti-rust,corrosion resistant,eco-friendly Screw Size: M2 Grade: Grade 2 Head Style: Hex Socket Head Cap Type: Metric Screws Drive Style: Hex-Key Thread Size: M2 System of Measurement: Metric Number in Pack: 820 Finish: Stainless Steel Unit Type: oz