<h3>Key features</h3><ul> <li>Exquisite Materials: M4 nuts and bolts assortment kit is made of high-quality carbon steel, which is hard, strong, thick, corrosion-resistant, scratch-resistant, not easy to rust and break, and has long-lasting durability and stability</li> <li>Hex Socket Button Head Cap Screws and Nuts and Washers Set: Round head hex socket head cap screws bolts design, large head contact area, more balanced force. This design makes it effortless to tighten the m4 bolts and nuts kit in narrow areas</li> <li>Hex Nuts and Washers Set: Each pan head hex socket head screw bolt is equipped with hex nuts for more precise installation; washers can increase the contact area, reduce stress and protect parts and screws, providing strong holding force</li> <li>Widely Used: Ideal for offices, factories, homes, and workshops, used in mechanical fields, communication equipment, electromechanical equipment, household appliances, engineering machinery, automobiles, motorcycles, etc</li> <li>Package Includes: You will receive a total of 930 pieces, including sizes of m4 x 6mm/8mm/10mm/12mm/14mm/16mm/20mm/25mm/30mm/35mm/40mm, washers and hex nuts of corresponding sizes, 1 x Allen wrench, to meet the daily use</li> </ul><p>What are the advantages of our M4 machine screw assortment kit? 1. The M4 bolt assortment kit is made of high-quality 10.9 grade carbon steel material, with high hardness, corrosion resistance, sturdiness and durability. 2. The M4 screw kit is designed with clear threads, which are not easy to deform and slide during use, and can be easily installed and removed with the included wrench. 3. The M4 nut and bolt kit adopts hex socket button head cap screws deisgn, with a large head contact area and more balanced force. 4. All M4 metric screw assortments are placed in storage boxes according to size for quick access and storage. 5. Suitable for maintenance work such as assembly, repair, and DIY work in offices, factories, homes, and workshops. Features: Material: 10.9 Grade Carbon Steel Color: Black Quantity: 930 Pcs Package Includes: 40 Pcs - M4x6mm 40 Pcs - M4x8mm 40 Pcs - M4x10mm 40 Pcs - M4x12mm 30 Pcs - M4x14mm 25 Pcs - M4x16mm 25 Pcs - M4x20mm 20 Pcs - M4x25mm 20 Pcs - M4x30mm 15 Pcs - M4x35mm 15 Pcs - M4x40mm 310 Pcs - M4 Nuts 310 Pcs - M4 Washers M4 Allen Wrench Warranty after sale: If you have any questions, please contact us in time, and we will solv</p><p>Free shipping included. 30-day hassle-free returns.</p>