Introducing our Sems Machine Screw, a versatile and essential component for a wide range of applications. Crafted from durable steel with a zinc finish coating, this screw ensures lasting strength and corrosion resistance. Compliant with ASME B18.13 specifications, it guarantees quality and precision in every use. Featuring a 4-40 thread size and a convenient Phillips drive type, it is easy to install and perfect for various projects. The included Square Conical Washer adds stability and support, while the Pan head type offers a sleek and professional finish. With a length of .25 inches, it is suitable for a variety of tasks. Rest assured, this screw is not only reliable but also environmentally friendly, thanks to its RoHS compliance. Trust in the quality of our Sems Machine Screw for all your fastening needs.