The 1586515-2: The through-hole solder termination suits wave-solder assembly, with a 0.150 in (3.81 mm) post length for standard board thicknesses.
Within the Commercial MATE-N-LOK family, this 4-position header is the compact single-row option for lower circuit-count power and signal distribution. Compared to a 6-position sibling, the 4-circuit variant saves board space while sharing the same 5.08 mm pitch, 12 A current rating, and gold contact finish — so the footprint scales linearly without changing the contact system or tooling.