Features: _x000D_ Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. _x000D_ Great for use in confined areas as fixing component, industrial and construction fasteners. _x000D_ There are many different length of button head screws that you can use for various purposes and projects. _x000D_ Total 480 pieces screws and nuts for general purpose use will meet your daily basic needs. _x000D_ Used widely on home and office appliance, communication equipment, ship assembly and other machinery industry. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: 304 stainless steel _x000D_ Grade: A2-70 _x000D_ Screw Type: Hex socket button head _x000D_ Thread: M2/M3/M4 _x000D_ Size & Quantity:_x000D_ _x000D_ M2 X 20 20pcs _x000D_ M2 X 16 20pcs _x000D_ M2 X 12 20pcs _x000D_ M2 X 8 20pcs _x000D_ M2 Nuts 80pcs _x000D_ _x000D_ _x000D_ M3 X 20 20pcs _x000D_ M3 X 16 20pcs _x000D_ M3 X 12 20pcs _x000D_ M3 X 8 20pcs _x000D_ M3 Nuts 80pcs _x000D_ _x000D_ _x000D_ M4 X 20 20pcs _x000D_ M4 X 16 20pcs _x000D_ M4 X 12 20pcs _x000D_ M4 X 8 20pcs _x000D_ M4 Nuts 80pcs _x000D_ Box Size: 13.2 x 7.2 x 2.3cm / 5.19 x 2.83 x 0.9" _x000D_ _x000D_ _x000D_ Package Includes:_x000D_ 1 Set x Screws & Nuts