An electrical connector (100) for being mounted onto a PCB includes an insulative housing (1); a set of electrical contacts (2) retained in the insulative housing (1); and a metal shell (3) coupled to the insulative housing. the metal shell (3) has a pair of nuts (310) integrally protruding therefrom and defining threaded holes (3101) for screws of a complementary plug screwed into, and a pair of board locks (5) integrally extending therefrom for being mounted onto the PCB.