Introducing our Sems Machine Screw, a reliable and efficient fastening solution for a variety of applications. This stainless steel screw features a #4-40 thread size and a durable construction, meeting ASME B18.13 standards for quality and performance. Paired with a square conical washer, it ensures secure and stable attachment, while the pan head and Phillips drive make installation a breeze. With a length of .5 inches, it's perfect for jobs that require precision and accuracy. Plus, it's RoHS compliant, guaranteeing its environmental friendliness. Trust in the durability and strength of our Sems Machine Screw for your next project.