Enhance assembly efficiency with our Sems Machine Screw, a versatile and durable fastening solution. Compliant with ASME B18.13 standards, this steel screw features a black oxide finish for enhanced corrosion resistance. Its 4-40 thread size and internal tooth washer ensure secure attachment, while the pan head and Phillips drive type facilitate easy installation. With a length of .3125 inches, it's ideal for various applications, meeting RoHS compliance for environmental responsibility. Upgrade your operations with this high-quality fastener.