Enhance your fastening solutions with our Button Head Socket Cap Screw, meticulously crafted for precision and durability. Made of high-grade steel with a Thermal Black Oxide coating, it ensures optimal performance in any application. Featuring a Torx Plus drive type for efficient installation, this screw is designed to meet ASME B18.3 specifications. With a thread size of 4-40 and a length of .5 inches, it offers versatility for various projects. Rest assured, our commitment to RoHS compliance guarantees its environmental responsibility. Upgrade your toolkit with this essential component for dependable and lasting results.