Introducing our Sems Machine Screw, a versatile and durable fastening solution for various applications. Made from high-quality stainless steel, this screw ensures reliable performance and longevity. Featuring a square conical washer, it offers enhanced stability and security upon installation. The pan head and Phillips drive type make it easy to tighten and secure in place. With a thread size of 4-40 and a length of .25 inches, it is suitable for a wide range of projects. Rest assured, this screw is compliant with RoHS regulations, making it a sustainable choice for your fastening needs. Elevate your assembly process with this premium machine screw.