<p>A header assembly (200) includes an insulative housing (100) comprising a plurality of walls defining an interior cavity (108), and a plurality of contacts (150, 170) within said cavity and extending through one of the walls to an exterior of the housing for surface mounting to a circuit board. The insulating housing (100) comprises at least one alignment rib (136) extending on an exterior surface thereof. The contacts are formed to abut the alignment rib, thereby ensuring coplanarity of the contacts for surface mounting to a circuit board.</p>
