Introducing our Button Head Socket Cap Screw, a versatile fastening solution crafted from high-grade steel with a durable zinc coating. Designed to meet ASME B18.3 specifications, this screw features a 4-40 thread size and a 10.9 material grade for optimal strength and performance. With a hex socket drive type and a length of .3125 inches, it offers easy installation and a secure hold. Rest assured, it is RoHS compliant, making it a sustainable choice for your projects. Upgrade your fastening arsenal with this premium quality Button Head Socket Cap Screw.