Description: These screws and nuts are made of 304 stainless steel, which is resistant to rust and corrosion. There are M3, M4, M5 screws of many lengths in this set which can be commonly used in home and office appliance, machinery, furniture, repair, inventions and other projects. Features: Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. Ideal for use as fixing component, industrial and construction fasteners where you need hex socket button head screws. M3, M4, M5 thread with many common length that you can use for general purpose. These screws and nuts will be great replacement for industrial and construction fasteners. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specifications: Material: 304 stainless steel Grade: A2-70 Color: Silver Type: Hex socket button head Standard: Metric Size & Quantity: M3 X 8 20pcs M3 X 12 20pcs M3 X 16 20pcs M3 X 20 20pcs M3 Nuts 80pcs M4 X 8 20pcs M4 X 12 20pcs M4 X 16 20pcs M4 X 20 20pcs M4 Nuts 80pcs M5 X 8 15pcs M5 X 12 15pcs M5 X 16 15pcs M5 X 20 15pcs M5 Nuts 60pcs Package Includes: 1 Set x Screws & Nuts