1. High-Precision Hardware Set Includes flat hex head screws, bolts, nuts, flat washers, and spring washers ? all organized in a convenient assortment kit for easy access and use. ? 2. Premium 304 Stainless Steel Made from high-quality 304 stainless steel, offering excellent rust resistance, durability, and long-lasting strength. Not easy to bend or break ? reliable for indoor and outdoor projects. ? 3. Complete 665-Piece Kit Contains commonly used sizes in M3, M4, M5, and M6, neatly stored in a clear organizer box. Easy to identify, select, and install. ? 4. Versatile Flat Hex Head Screws Flat hex head screws are highly versatile and ideal for fastening metal, wood, fiberglass, and plastic. Perfect for general repair and construction tasks. ? 5. Wide Range of Applications Excellent for machinery maintenance, furniture assembly, automotive and motorcycle repair, workshops, and DIY projects. ? Package Includes (Total: 665pcs) ? Screws M3 x 16 ? 20 pcs M3 x 20 ? 20 pcs M3 x 25 ? 20 pcs M4 x 16 ? 20 pcs M4 x 20 ? 20 pcs M4 x 25 ? 20 pcs M5 x 16 ? 10 pcs M5 x 20 ? 10 pcs M5 x 25 ? 10 pcs M6 x 20 ? 10 pcs M6 x 30 ? 10 pcs ? Nuts M3 ? 60 pcs M4 ? 55 pcs M5 ? 30 pcs M6 ? 20 pcs ? Flat Washers M3 ? 60 pcs M4 ? 55 pcs M5 ? 30 pcs M6 ? 20 pcs ? Spring Washers M3 ? 60 pcs M4 ? 55 pcs M5 ? 30 pcs M6 ? 20 pcs ? Product Details Material: 304 Stainless Steel Type: Flat Hex Head Sizes: M3, M4, M5, M6 Total Quantity: 665 Pieces Packaging: Clear compartment organizer box ? Why This Set Is Perfect This 665-piece assortment includes some of the most commonly used screw, nut, and washer sizes, making it ideal for: ? Machinery repair ? Furniture assembly ? Automotive motorcycle maintenance ? Home projects ? Workshop use ? DIY inventions custom builds Reliable, durable, and easy to use ? a must-have hardware kit for any toolbox.