820 Pcs M4 Bolts and Nuts Set, Countersunk Machine Screws, Lock & Spring Washers Assortment, Flat Head Hex Socket Head Cap Screws Set, Black

• Exquisite Material: M4 bolts and nuts set are made of high-quality carbon steel with high hardness and high torque, superior stability and density, not easy to break or deform, corrosion-resistant, not easy to rust, and have long-lasting durability and stability.
• Countersunk Flat Head Hexagon Socket Bolts and Nuts Set: M4 nuts and bolts adopt a flat head hexagon design, large contact area, more balanced force, and can tighten and loosen the screws more easily with a hexagonal wrench. The thread is uniform and smooth, the texture is clear, the use is balanced, the tightening effect is good, and it is not easy to slip.
• Equipped with Nuts & Flat Washers & Spring Washers: Equipped with nuts and two types of washers, flat washers can reduce friction and prevent leakage, thereby protecting parts from damage; spring washers help maintain clamping force and prevent loosening or tension loss due to vibration, thermal cycle or other factors.
• Multi-scenario Application: Suitable for assembly, maintenance, and DIY work in offices, factories, homes, and workshops. Widely used in the field of machinery, communication equipment, electromechanical equipment, marine equipment, household appliances, engineering machinery, automobiles, motorcycles, and other parts fixing.
• Package Includes: 820 pcs in total, sizes and quantities include: 35 pcs m4x6mm, 30 pcs m4x8mm, 30 pcs m4x10mm, 30 pcs m4x12mm, 20 pcs m4x18mm, 20 pcs m4x20mm, 20 pcs m4x25mm, 20 pcs m4x30mm, 205 pcs m4 nuts, 205 pcs m4 flat washers, 205 pcs m4 lock washers, sufficient quantity and rich sizes to meet the needs of multiple scenarios.

What are the advantages of our nut and bolt set? ✔ M4 countersunk bolts are made of high-quality carbon steel, with exquisite workmanship, high hardness, corrosion resistance, long-lasting durability, and stability. ✔ Flat head hexagon socket screw design, larger force area, and smaller average load when tightened, easy to install and remove with the included wrench. ✔ Equipped with nuts and two types of washers, flat washers can reduce friction and prevent leakage, thereby protecting parts from damage; spring washers help maintain clamping force and prevent loosening or tension loss due to vibration, thermal cycling, or other factors. ✔ All hexagon socket bolt sets are placed in transparent reusable storage boxes according to size for quick access and storage. ✔ Suitable for a variety of large-scale industries and small repairs, such as assembly, repair, and DIY work in offices, factories, homes, and workshops. Features: Material: Carbon Steel Color: Black Quantity: 820 Pcs Package Includes: 35 Pcs - M4x6mm 30 Pcs - M4x8mm 30 Pcs - M4x10mm 30 Pcs - M4x12mm 20 Pcs - M4x18mm 20 Pcs - M4x20mm 20 Pcs - M4x25mm 20 Pcs - M4x30mm 205 Pcs - M4 Nuts 205 Pcs - M4 Flat Washers 205 Pcs - M4 Lock Washers After-sales guarantee: If you have any questions, please contact us in time and we will solve your questions as soon as possible. Warm tips: The color may be slightly different from the online image due to the color settings of your monitor. Please refer to the actual product. Thank you for your understanding.