Nuts & Bolts descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Alloy Steel Countersunk Flat Head Hex Socket Cap Screws Nuts Set. Features: High Precision Hex Hex Drives Flat Head Socket Cap Bolts Screws. Oxide Finish. Different Sizes of M3 M4 M5 Screws and Nuts Total 460pcs in a Transparent Box Which Are Commonly Used Size. Flathead Countersunk Screws Which Head Can Be Better Embedded in the Installation Surface to Ensure That the Surface Smooth. Application: Great for Indoor and Outdoor Use, in the Home and Office Appliance, Communication Equipment, Ship Assembly and Other Machinery Industry. Specifications: 460-Pack Screws Nuts Assortment Kit Comes in a Plastic Box. Package Quantity: 460 Pcs Color: Black Material: Alloy Steel Size: M3 M4 M5 (Include M3 M4 M5 Nuts) Package Included: 30 X Pcs M3 X 8 Nuts 30 X Pcs M3 X 12 Nuts 30 X Pcs M3 X 16 Nuts 30 X Pcs M3 X 20 Nuts 100 X Pcs M3 Nuts 20 X Pcs M4 X 8 Nuts 20 X Pcs M4 X 12 Nuts 20 X Pcs M4 X 16 Nuts 20 X Pcs M4 X 20 Nuts 80 X Pcs M4 Nuts 10 X Pcs M5 X 8 Nuts 10 X Pcs M5 X 12 Nuts 10 X Pcs M5 X 16 Nuts 10 X Pcs M5 X 20 Nuts 40 X Pcs M5 Nuts. Products number : SOMONO133395