<h3>Key features</h3><ul> <li>Exquisite Materials: All m3 m4 m5 m6 hex button head bolts and nuts kits are made of high-quality carbon steel, which is strong, anti-corrosive, not easy to rust, and strong, with long-lasting durability and stability</li> <li>Hex Socket Button Head Cap Screws and Nuts and Washers Set: m3 m4 m5 m6 Round head hex socket head cap screws bolts design, uniform force, deep thread and precise thread, not easy to deform or slip during work</li> <li>Hex Nuts and Washers Set: Each round head pan head hex socket metric bolt assortment is equipped with a hex nut for more precise installation; washers can increase the contact area, reduce stress and protect parts and screws</li> <li>Wide Application: Widely used in home and office appliances, communication equipment, ship assembly, machinery industry, furniture, automobile and motorcycle repair, DIY and other fields</li> <li>Package Includes: A total of 1170 pcs: M3 x 8mm/12mm/16mm/20mm, M4 x 8mm/12mm/16mm/20mm, M5 x 8mm/12mm/16mm/20mm, M6 x 8mm/12mm/16mm/20mm, including nuts and washers of corresponding sizes, and m3 m4 m5 m6 allen wrench</li> </ul><p>What are the advantages of our m3 m4 m5 m6 screw kit? 1. The m3 m4 m5 m6 nut and bolt kit is made of high-quality carbon steel material, which is sturdy and durable for long-term use. 2. The matching nuts and washers can expand the contact area, reduce pressure, protect screws and parts, and extend the service life of hardware. 3. The m3 m4 m5 m6 bolt and nut set is designed with hex socket button head cap screws, which has high holding force under high torque, is not easy to deform or slide, and has a more balanced force. 3. All m3 m4 m5 m6 bolt assortment kits are packed in a storage box, which is easy to use, find and carry. 4. Widely used in home office appliances, communication equipment, ship assembly, machinery manufacturing, furniture, auto and motorcycle repair, DIY inventions and other fields. Features: Material: Carbon Steel Color: Black Quantity: 1170 Pcs Package Includes: 50 Pcs - M3x8mm 50 Pcs - M3x12mm 40 Pcs - M3x16mm 40 Pcs - M3x20mm 180 Pcs - M3 Nuts 180 Pcs - M3 Washers 30 Pcs - M4x8mm 30 Pcs - M4x12mm 25 Pcs - M4x16mm 25 Pcs - M4x20mm 110 Pcs - M4 Nuts 110 Pcs - M4 Washers 15 Pcs - M5x8mm 15 Pcs - M5x12mm 10 Pcs - M5x16mm 10 Pcs - M5x20</p><p>Free shipping included. 30-day hassle-free returns.</p>