Abstract: A socket connector is provided that includes a housing holding a plurality of electrical contacts. The housing includes a base having a top side and a bottom side. Opposed side walls upwardly extend from the top side of the base. A datum protrusion is formed on each of the side walls. The datum protrusions define a first dimension extending in a first direction and a second dimension extending in a second direction that is perpendicular to the first direction. The first and second dimensions extend from a maximum protrusion on one of the side walls to a maximum protrusion on an opposed side wall. An inspection window is proximate each datum protrusion. The inspection window enables a measurement of the first dimension and the second dimension.