Welcome to our shop! 500 pieces in 4 sizes: 500 pieces screws and nuts include M3*8 M3*12 M3*16 M3*20 M4*8 M4*12 M4*16 M4*20 M5*8 M5*12 M5*16 M5*20, M3/M4/M5 Nuts, enough to meet your daily needs. Sturdy and durable: Our high quality 304 stainless steel socket head cap screws provide superior rust and corrosion resistance in harsh environments, ensure use long term. Excellent craftsmanship: stainless steel hexagon socket screws are exquisitely processed, using CNC cutting technology, the threads are precise and clean, and conform to the coarse pitch standard metric. Wide application: Hexagon socket bolt and nut sorting kits are suitable for professionals, hobbyists, homeowners, repairmen and other DIYers. Ideal for replacing damaged and missing bolts. Portable Combination: All flat head screws are stored in a thickened transparent plastic sorting box and attached with a specification sheet for easy identification, convenient for daily use and storage. Please confirm the size before buying! Shipping Quantity: 500pcs/box Product color: Silver Product size: M3*8 M3*12 M3*16 M3*20 M4*8 M4*12 M4*16 M4*20 M5*8 M5*12 M5*16 M5*20 Note: manual measurement, please note please allow 1 - 3cm error!!! 100% satisfaction - Our customers are our priority. If you find any problems with the products after receiving the goods, such as damage and incorrect quantity, please contact us immediately. We do our best to provide you with satisfactory after-sales service.