Comprehensive 510-Piece Set – This all-in-one hardware kit includes M4, M5, and M6 hex head cap screws, nuts, flat washers, and spring washers. Covering 15 essential sizes, it is the perfect solution for electronics repair, furniture assembly, door handle installation, and general DIY projects. Premium 304 Stainless Steel – Crafted from high-quality 304 stainless steel, these fasteners offer superior rust and corrosion resistance. They are built to withstand humid environments like kitchens and bathrooms, as well as outdoor conditions, ensuring long-lasting durability and a clean silver finish. Secure & Professional Fit – Each screw features a precision-cut thread for smooth, slip-free fastening. The kit includes both flat washers to protect surfaces from damage and spring washers to prevent nuts from loosening due to vibration, providing a secure and stable connection. Organized Storage Box – Keep your workspace tidy with the included heavy-duty transparent case. The compartments are clearly labeled for quick identification, allowing you to find the exact size you need instantly without rummaging through messy piles. Cost & Time Efficient – With a scientifically curated quantity based on common usage, this 510-piece assortment covers 90% of your daily fastening needs. It eliminates the need for frequent trips to the hardware store, saving you both time and money. UPC 606034595156 ASIN B07258SBG5 Brand DANA FRED Color Silver Model M4M5M6 Set Name 510-Piece M4/M5/M6 Bolt and Nut Kit Size Name M4M5M6 Item Shape Hexagonal Unit Count 1 Count Part Number XHHDS008 Finish Types Brushed Grade Rating industrial Manufacturer ALBERT GUY Fastener Type Hex Item Diameter 4 millimeters Material Type Stainless Steel Number Of Items 510 Number of Packs 1 Number of Pieces 510 Screw Head Style Hex