Electrical connector

Electrical connector comprising an insulative material body having a series of passages disposed in parallel rows and each adapted to receive a male or female electrical contact member crimped to one end of a conductor and having a shoulder partway along its length, said body including slots in walls separating said rows of passages and conduits near two opposite walls, a key for locking said contact members being provided in the form of a U-shaped member with two branches adapted to be inserted into said conduits and a center section with upstanding therefrom a series of parallel bars adapted to be inserted into said slots and to cooperate with said shoulders of said electrical contact members to lock them in said passages, wherein said slots are perpendicular to the axes of said passages and extend from one of said conduits adapted to receive one branch of said key to the other conduit adapted to receive the other branch, so as to form two lips in each wall separating said rows of passages, said bars each having a profile featuring at least one rib facing towards one lip, the lip including a corresponding groove to receive the rib and edges projecting into the passages of two adjoining rows.