An electrical connector having a zero force insertion upon mating of a first connector member and a second connector member. Each of the connector members contains contacts mounted in bores formed therein. The contacts in one of the connector members extend forwardly from the bores therein. A split insulator member in such connector member forms a pair of actuating plates. A rotatable actuating shaft is disposed between the plates and carries an actuating cam which, when the shaft is rotated, shifts the actuating plates apart to mate the contacting surfaces of the contacts in the respective connector members. A pair of additional actuating cams are rotatably mounted between the actuating plates on opposite sides of the actuating shaft. A gear on the shaft engages gears fixed to the additional cams so that the latter cams will rotate upon rotation of the actuating shaft, thereby providing an evenly distributed actuating force on the actuating plates preventing the plates from skewing against the connector housing. The additional actuating cams are rotatably mounted on polarizing posts which may be selectively mounted in various positions so that the connector member containing the posts may be coupled to only a predetermined mating connector member.