Introducing our Button Head Socket Cap Screw, a reliable fastening solution that combines strength and durability. Made from high-grade steel with a thermal black oxide finish, this screw is built to withstand tough conditions. Featuring a metric M4 x 0.7 thread size and a 40mm length, it is suitable for a variety of applications. The ISO 7380-1 specification guarantees quality and precision, while the 12.9 material grade ensures exceptional tensile strength. With a hex socket drive type, installation is quick and easy. Rest assured, this screw is also RoHS compliant, meeting environmental standards. Upgrade your fastening needs with our Button Head Socket Cap Screw.