High Quality Stainless Steel Hex Socket Button Head Bolts Screws Nuts Drive Type: Hex Socket; Head Style: Button Head Material: 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: silver Package Quantity: 500Pcs Designed 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: 30Pcs M3 * 8mm Screws 30Pcs M3 * 12mm Screws 30Pcs M3 * 16mm Screws 30Pcs M3 * 20mm Screws 20Pcs M4 * 8mm Screws 20Pcs M4 * 12mm Screws 20Pcs M4 * 16mm Screws 20Pcs M4 * 20mm Screws 15Pcs M5 * 8mm Screws 15Pcs M5 * 12mm Screws 10Pcs M5 * 16mm Screws 10Pcs M5 * 20mm Screws 1 * box 3 * wrench Only the above package content, other products are not included. Note: Light shooting 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.