1-1586039-4 is a vertical pin header with pegs designed for the VAL-U-LOK wire-to-board connector system. This 4-position header is constructed from UL 94V-2 rated nylon material and features PCB pegs for secure mounting on printed circuit boards. The header accommodates standard pin contacts and is available with tin or 30 µin gold plating options to suit various environmental and reliability requirements. It is commonly used in wire-to-board applications requiring reliable, keyed connections with mechanical retention, particularly in industrial and automotive electronics where robust interconnection is essential.