This 380-piece M4 metric screw and bolt assortment kit is your complete fastening solution for a wide range of projects. Made from high-strength Grade 12.9 alloy steel, these hex socket head cap screws offer exceptional durability and superior corrosion resistance, making them ideal for high-stress, demanding applications. This comprehensive kit includes a full range of M4 bolts, nuts, and washers in various lengths (M4 x 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm), ensuring you always have the right fastener on hand. It's the perfect hardware assortment for professionals and DIY enthusiasts alike. Whether you're repairing machinery, assembling furniture, or tackling other DIY projects, this kit provides a dependable, long-lasting solution. The screw and bolt kit comes in a reusable, transparent storage case with labeled compartments, keeping everything organized and easy to find. Rely on this heavy-duty metric bolt assortment for a secure, professional finish every time.