<p>A receptacle connector part comprises a connector housing (1) and a plurality of rows of receptacle contact terminals (2) disposed within the housing. Each receptacle contact terminal includes two single beam contacts (3) having contact portions (4) with a preloading head (5). The connector housing comprises a front wall with a plurality of rows of apertures (7) providing access to the contact portions of the contact terminals. The connector housing is provided with a plurality of rows of preload ridges (8), the preload ridges being located at the inner side of the front wall at opposed sides of the apertures. The preload ridges cooperate with the preloading heads to support the contact portions of the single beam contacts of each contact terminal in a predetermined preload position.</p>
