The Button Head Socket Cap Screw, a sleek and versatile fastening solution for a wide range of applications. Crafted from durable stainless steel in compliance with RoHS standards, this screw guarantees both strength and sustainability. Designed with a 4-40 thread size and a convenient hex socket drive type, it offers easy and efficient installation. With a length of .625 inches, it is perfect for securing various components securely in place. Meet your fastening needs with this high-quality ASME B18.3 compliant screw.