Sealed electrical connector part

An assembly comprising a connector part and a tool for piercing a blocking member of the connector part, wherein the connector part is designed for being coupled with a matching connector part by a front face,

• said connector part comprising:
• an insulating housing provided with a plurality of sockets for receiving a contact, which have a rear contact insertion end,
• a sealing joint, which is provided with a plurality of cable passages corresponding to the sockets and which is placed in said housing behind the sockets, and
• a grid for guiding the cables, which is fixed in the housing behind the sealing joint, wherein said grid supports the joint, said grid being provided with a plurality of cable passages corresponding to the sockets,
• wherein the connector part comprises a blocking member of the passages of the grid, which is fixed on said grid, and is designed to be pierced selectively for inserting the contacts into a group of predetermined sockets,
• said tool comprising a body and a plurality of pins, which project from said body in a parallel manner and in a same direction and which are designed to pierce the blocking member at points corresponding to a predetermined group of the sockets.