Introducing our Button Head Socket Cap Screw, a versatile fastening solution that combines strength and durability with sleek design. Made from high-grade steel with a Thermal Black Oxide finish, this screw is built to withstand tough conditions while maintaining a professional appearance. Featuring a 4-40 thread size and ASME B18.3 specification, it ensures precise and secure installation. The hex socket drive type offers easy and efficient assembly, while the 0.25-inch length makes it perfect for a variety of applications. Rest assured, this screw is not only reliable but also environmentally friendly, with full RoHS compliance. Upgrade your hardware with this top-quality Button Head Socket Cap Screw.