Enhance your assembly process with our Sems Machine Screw, a versatile and efficient fastening solution. This high-quality screw features a durable steel construction with a corrosion-resistant zinc finish, ensuring longevity and reliability. Designed to meet ASME B18.13 specifications, it guarantees precision and consistency in every application. The included Square Conical Washer provides added stability and support, while the Pan head and Phillips drive type offer easy installation. With a thread size of 4-40 and a length of .1875 inches, it's perfect for a variety of projects. Rest assured, this screw is also RoHS compliant, making it an environmentally friendly choice. Upgrade your machinery with this essential component today.