Product Details: Color: Silver Material: 304 Stainless Steel 18/8 Thread Type: Full Thread Hex Socket Cap Screws: 30pcs x M2-0.4x4mm,30pcs x M2-0.4x6mm,30pcs x M2-0.4x8mm,30pcs x M2-0.4x10mm,30pcs x M2-0.4x12mm,30pcs x M2-0.4x16mm,30pcs x M3-0.5x4mm,30pcs x M3-0.5x6mm,30pcs x M3-0.5x8mm,30pcs x M3-0.5x10mm,30pcs x M3-0.5x12mm,30pcs x M3-0.5x16mm Hex Nuts: 70pcs x M2-0.4, 70pcs x M3-0.5 Total Package Content: 500pcs x Button Head Hex Socket Screws Nuts Assortment Kits Material - Constructed with 304 stainless steel material with white washing treatment, these hex socket cap screws are of strong durability, has a bright appearance, is not easy to deform or corrode, and has a long service life than other steel or zinc plated fasteners.Feature - The button socket head cap screw is designed with an inner hex drive style and pan head, providing a higher torque and clamping force, as well as offering a wider bearing surface and high tensile strength. Application - Good replacement parts and construction fasteners for use in most machinery industries, automotive industries, electronics industries, manufacturing applications, die fixtures, and clamps.Installation - To access this hex drive screw, you will need to use a hex wrench to tighten or loosen. The socket button head design enhances torque capabilities, allowing for greater clamping force. For optimal results, it is recommended to use a retaining washer to securely lock the hex drive in place.