<h3>Key features</h3><ul> <li>1500-Piece Complete Hardware Kit This all-in-one metric screws assortment kit, fastener assortment includes 188pcs button head hex socket in 8 sizes (M4x6/8/12/16/20/25/30/40mm) and 187pcs head cap hex socket in 8 sizes (M4x6/8/12/16/20/25/30/40mm), 375pcs hex nuts, and 750pcs washers (flat washers and spring lock washers). This nuts and bolts set serves as a practical metric bolt assortment, equipped with full assorted nuts and bolts and all essential screws and nuts. Perfect for professionals, hobbyists, and DIY enthusiasts.</li> <li>Grade 12.9 &amp; 10.9 Industrial Strength &amp; Weatherproof Made from high-strength 12.9 &amp; 10.9 grade alloy steel with black oxide coating, our metric screws assortment kit is practical screw &amp; bolt assortment sets. It offers great tensile strength and corrosion, rust and resistance. Weatherproof for outdoor rain, humidity, extreme temps. Screws in this bolts and nuts kit have tolerances ≤0.01mm for consistent threading and secure fit. Premium metric screws form the metric machine screw assortment. This robust nuts and bolts set stays intact after repeated assembly in harsh conditions.</li> <li>Adjustable Compartment Storage Box All 1500 pieces of this metric screw assortment are neatly organized in a durable storage container with adjustable dividers. This metric hardware kit holds complete m4 screw kit with sturdy metric machine screws. It features reliable hex screws, forming a handy bolt and nut set. Color-coded size stickers enable fast identification. Find the exact m4 screws, nuts and flat washers you need in seconds. The compact box fits easily in your toolbox, workshop drawer, or garage shelf.</li> <li>Bonus Allen Hex Key Wrenches Included Each metric fasteners assortment kit comes with 2 premium black oxide Allen hex keys in 2.5mm and 3mm specifically matched to the screw sizes in this set. Everything you need, including metric machine screws, is in the box — no additional tools required. Start your project right out of the package.</li> <li>Versatile Indoor &amp; Outdoor Applications This metric hardware screw assortment is ideal for 3D printing, RC models, electronics repair, drones, robotics, bicycle maintenance, furniture assembly, outdoor equipment, marine applications, RV and boat repairs, garden tools, and general DIY projects. Whether you need m4 screw kit for small electronics, 3D printers, RC cars, or weatherproof fasteners for outdoor use, this metric bolts and nuts assortment has the right fastener for every task, indoors and outdoors.</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>