The Flat Head Machine Screw, a reliable and sturdy fastening solution for a variety of applications. This ASME B18.6.3 compliant screw features a 4-40 thread size, making it compatible with standard hardware. Crafted from durable steel with a zinc coating, it offers enhanced corrosion resistance for long-lasting performance. The Phillips drive type ensures easy installation, while the flat head design provides a flush finish. With a length of .3125 inches, this screw is ideal for securing components in place securely. Trust in its quality construction for your fastening needs.