Usage Tips:Made of stainless steel material, the stainless steel material provides strength and offers good corrosion resistance in many environments. Perfect for use as fixing component, industrial and construction fasteners where you need hex socket cap head screws. M2, , thread with many common length you can use for . These screws and nuts will be great replacement for industrial and construction fasteners. Used widely in the home and office appliance, communication equipment, assembly and other machinery industry. These screws and nuts are made of 304 stainless steel, which is resistant to rust and corrosion. There are M2, , screws of many lengths in this set which can be commonly used and office appliance, machinery, furniture, repair, inventions and other projects. Material: 304 stainless steel : A2-70 Color: Silver Type: Hex socket cap head Standard: Metric Size & : M2 X 20 20pcs M2 X 16 20pcs M2 X 12 20pcs M2 X 8 20pcs M2 Nuts 80pcs X 20 20pcs X 16 20pcs X 12 20pcs X 8 20pcs Nuts 80pcs X 20 20pcs X 16 20pcs X 12 20pcs X 8 20pcs Nuts 80pcs Box Size: 13.2 x 7.2 x 2.3cm / 5.19 x 2.83 x 0.9 inche Includes: 1 480 Pcs hex screw and nut fasteners Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.