This Button Head Socket Cap Screw is a versatile fastener suitable for a wide range of applications. Crafted from durable stainless steel with a sleek thermal black oxide finish, it offers both strength and corrosion resistance. Designed to meet ASME B18.3 specifications, it features a 4-40 thread size and a convenient hex socket drive type for easy installation. With a length of .3125 inches, it is perfect for securely fastening components in place. This screw is also RoHS compliant, making it an environmentally friendly choice for your projects.