High Quality Stainless Steel Hex Socket Button Head Bolts Screws NutsDrive Type: Hex Socket; Head Style: Button HeadMaterial: 304 Stainless Steel; Different Size of M3 M4 M5 (Include M3 M4 M5 Nuts)Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry.color: silverDesigned with 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments.Perfect for use in confined areas where the head needs to be flush or below the surface.Fixing component, industrial and construction fasteners.Package included:60Pcs M3 x 8mm Screws60Pcs M3 x 12mm Screws60Pcs M3 x 16mm Screws60Pcs M3 x 20mm Screws40Pcs M4 x 8mm Screws40Pcs M4 x 12mm Screws40Pcs M4 x 16mm Screws40Pcs M4 x 20mm Screws30Pcs M5 x 8mm Screws30Pcs M5 x 12mm Screws20Pcs M5 x 16mm Screws20Pcs M5 x 20mm Screws2 x box6 x wrenchOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.