Upgrade your fastening solutions with our Button Head Socket Cap Screw. Made from high-grade steel with a durable Thermal Black Oxide finish, these screws are designed to withstand the test of time. Featuring a 4-40 thread size and ASME B18.3 specification type, they ensure precise and secure fastening in any application. The 10.9 material grade guarantees strength and reliability, while the hex socket drive type allows for easy installation. With a length of .3125 inches, these screws are perfect for a variety of projects. Plus, rest assured knowing they are RoHS compliant, making them environmentally friendly. Elevate your construction or repair projects with these top-quality screws.