An electrical connector for use with an electronic package, includes an insulative housing with a number of contacts receiving in the insulative housing and a fastening mechanism assembled to the insulative housing adapt to secure the electronic package to the electrical connector. The fastening mechanism includes a cover with a base plate and a pair of sidewalls extending downwardly from the base plate. The cover has an opening in the center of the base plate and a number of pressing portions extending into the opening for pressing the electronic package contact with the contacts.