KAHEIGN 500Pcs Hex Socket Nuts and Bolts, M3 M4 M5 Button Head Machine Screws Alloy Steel Pan Black Bolts Kit with Storage Box

[High quality] Made of high quality carbon steel, with black surface, high hardness, not easy to rust, moisture-proof, anti-oxidation, anti-corrosion, acid and alkali resistance [Sorted Storage] All nuts and bolts are packed in a plastic box with multiple convenient compartments, different lengths, complete types, well organized, easy to open and find [Easy to use] Nuts can expand the contact area and reduce pressure, to protect screws and parts. The hexagonal steel thread is uniform, smooth and tight, not easy to deform and slide during work [Size] Drive type: hex socket, head type: button head, size: M3, M4, M5, length: 8mm, 12mm, 16mm, 20mm, 500 pieces of different sizes and specifications of M3 M4 M5 screws with matched nuts [Applicable] Suitable for home and office appliances, communication equipment, marine assembly, furniture, car and motorcycle repair, DIY supplies, industrial and construction fasteners