Introducing our Sems Machine Screw, a versatile and essential component for various assembly applications. Crafted from durable steel with a corrosion-resistant yellow zinc finish, this screw ensures long-lasting performance. Compliant with ASME B18.13 standards, it guarantees quality and precision in every use. The external tooth washer provides secure fastening, while the pan head and Phillips drive offer easy installation. With a 4-40 thread size and a length of .1875 inches, it is suitable for a wide range of projects. Upgrade your assembly process with this reliable and efficient machine screw.