Enhance your assembly process with the Sems Machine Screw, a reliable and efficient fastening solution. Designed to streamline installation, this screw features a #4-40 thread size and a durable steel construction with a protective zinc finish. The included external tooth washer ensures secure attachment, while the Phillips pan head offers ease of use. Measuring 1.25 inches in length, it's perfect for various applications. Trust in its quality and performance for your projects. Please note, this product is not RoHS compliant.