Enhance your assembly process with our Sems Machine Screw, a versatile fastening solution designed for efficiency and durability. This high-quality steel screw features a 4-40 thread size, perfect for a wide range of applications. The external tooth washer provides secure grip and prevents loosening over time, while the zinc finish coating offers added protection against corrosion. With a pan head and Phillips drive type, installation is quick and easy. Measuring at .3125 inches in length, this screw is ideal for projects requiring precision and reliability. Rest assured, it is also RoHS compliant, meeting environmental standards for responsible manufacturing. Upgrade your toolkit with this essential component for seamless assembly.