Introducing a reliable solution for your fastening needs - the Fillister Head Machine Screw. Crafted from durable brass and compliant with RoHS regulations, this high-quality screw guarantees both strength and sustainability. Featuring a 4-40 thread size and ASME B18.6.3 specification, it is tailored for precision and performance. The fillister head design ensures a secure grip, while the slotted drive type allows for easy installation. With a length of .25 inches, this versatile screw is perfect for a multitude of applications. Trust in its quality craftsmanship to get the job done efficiently and effectively.