Feature: 1. Galvanized Steel Material: Hex socket screws are made of galvanized steel, high strength, durability and corrosion resistance 2. Sufficient Quantity: There are 50pcs round head hex socket screws in a set of sufficient quantity to meet the various needs of users 3. Application: Widely used for various accuracy machinery industries, classified instruments, instruments, electronics, printing projects, etc. 4. Basic Specifications: This is round head hex socket that is easy to install, the thread model is M4x0.7mm 5. Scope of Application: Used for machinery industries such as household and office electrical appliances, communication equipment, ship assembly, etc. Specification: Item Type: Button Head Socket Caps Screws Material: Galvanized Steel Thread Model: Approx. M4x0.7mm / 0.03in Model Working Length (Approx.) 2802-0004-0025 25mm / 1.00in 2802-0004-0030 30mm / 1.18in 2802-0004-0035 35mm / 1.38in 2802-0004-0040 40mm / 1.57in 2802-0004-0045 45mm / 1.77in 2802-0004-0050 50mm / 2.00in 2802-0004-0055 55mm / 2.16in 2802-0004-0060 60mm / 2.36in . Package List: 50 x Screw Note: Match the right size before use