Enhance your fastening solutions with this high-quality Button Head Socket Cap Screw. Made of durable steel with a thermal black oxide finish, it offers both strength and corrosion resistance. Compliant with ASME B18.3 specifications and boasting a material grade of 10.9, this screw is designed for reliable performance. Featuring a 4-40 thread size and a convenient hex socket drive type, it is perfect for a variety of applications. With a length of .25 inches, it is suitable for securing components with precision. Rest assured of its environmental friendliness with RoHS compliance. Upgrade your toolkit with this essential fastener.