The present invention relates to a linear connection assembly (100) for electrical conductors comprising a pair of connectors (1, 2) with mutually complementary shape for the insertion of a first connector (1) into a second connector (2) in an axial direction; each connector (1, 2) being provided with electrical contacts (5, 6) adapted to connect electrically to each other when the first connector (1) is inserted in the second connector (2), at least one connector (2) of the pair of connectors (1, 2) being provided with a ring nut (4) mounted in at least partially rotatable manner manually around its own axis (A) parallel to said axial direction to reach a plurality of alignment positions relative to the other connector (1) of the pair of connectors (1, 2), each alignment position corresponding to a connection condition between the pair of connectors (1, 2); t a first alignment position (17) results from a complete insertion of said first connector (1) into said second connector (2), and corresponds to a first connection condition according to which said connectors (1, 2) cannot be released even if a mutual traction is applied in the axial direction.