Enhance the efficiency of your assembly processes with our Sems Machine Screw. Crafted from durable steel with a protective zinc coating, this screw ensures longevity and reliability in various applications. Featuring a square conical washer and a pan head with a Phillips drive, it offers convenient installation and secure fastening. With a thread size of 4-40 and a length of .3125 inches, it is suitable for a wide range of projects. Rest assured, this product is RoHS compliant, meeting environmental standards. Elevate your hardware game with this essential component.