Introducing our Sems Machine Screw, a versatile and essential component for a wide range of applications. This high-quality steel screw features a durable zinc finish, ensuring long-lasting performance in various environments. Designed to meet ASME B18.13 specifications, it guarantees reliable functionality. With a thread size of 4-40 and a length of .5 inches, it's perfect for fastening tasks of all kinds. The included Square Conical Washer provides added stability and support, while the Phillips drive type offers easy installation. Rest assured, this product is RoHS compliant, prioritizing environmental sustainability. Upgrade your equipment with this top-tier machine screw, a must-have in any toolkit.