Abstract: An electrical connector receptacle shell assembly and an electrical connector plug assembly are mated together to provide electrical contact between a matrix of pins and sockets. An annular drive sleeve telescoped within a coupling nut having a floating bayonet pin coupling mechanism causes the connector plug shell within the electrical plug shell assembly to move axially forward onto the receptacle shell as the coupling nut is rotated. An anti-rotation latch mechanism prevents the inadvertent misalignment of the components within the connector plug assembly, so that the connector plug shell assembly remains annularly aligned with the coupling nut until the receptacle shell and the electrical plug assembly are coupled. The latch mechanism is thereby released and the coupling nut can then rotate relative to the first shell.