The Flat Head Socket Cap Screw, a durable and versatile fastening solution for a variety of applications. This ASME B18.3 compliant screw features a 4-40 thread size, making it ideal for use in machinery, electronics, and more. Constructed from high-quality steel and finished with a protective zinc coating, it offers excellent corrosion resistance and longevity. With a length of .4375 inches, it's perfect for securely fastening components in place. Rest assured, this screw is also RoHS compliant, meeting international standards for environmental responsibility. Upgrade your fastening arsenal with this essential hardware piece.