Patent ID: 7377799

Claim:
An electrical connector comprising: an outer casing; first and second electrical connector modules received and retained in the outer casing with mating directions thereof opposite to each other; an intermediate module located between the first and second electrical connectors to electrically connect the first and second electrical connector modules and enclosed by the outer casing; at least one fastening device mounted in the outer casing, the fastening device comprising a manual handle only partially exposed outside of said outer casing for manual operation, a rod partially received in the manual handle with threads on a front portion and movable axially relative to the manual handle, and a C-ring surrounding and extending beyond the rod for forming a circumferential rib around the rod; and wherein when the manual handle is turned by a user, the rod with the C-ring moves axially grid forwardly relative to the manual handle until the C-ring moves a predetermined distance and is barred; wherein the rod comprises a helical thread, and a hexagonal portion received in a hexagonal through hollow defined by the manual handle and defining an annular slot for allowing C-ring to surround; wherein the electrical connector module comprises a shell defining a through hole with a diameter being smaller than that of the C-ring, through which the helical thread extends and the C-ring is barred.