Introducing our Sems Machine Screw, a versatile and reliable fastening solution for various applications. Crafted from high-quality stainless steel with a sleek black oxide finish, this screw offers both durability and a professional look. Compliant with ASME B18.13 standards, it guarantees precision and performance. Featuring a square conical washer for enhanced stability, and a pan head with a Phillips drive for easy installation. With a thread size of 4-40 and a length of .25 inches, it is suitable for a range of projects. Rest assured, this screw is also RoHS compliant, making it environmentally friendly. Upgrade your fastening with this top-quality Sems Machine Screw.