A liquid-tight connector may include a riveting cap, a rotating connector, a threading unit, a sealing ring and a conduit locknut. In one embodiment, an O-ring may be disposed between the rotating connector and the threading unit to enhance the liquid-tight effect of the connector. It is important to note that the rotating connector is configured to engage with the riveting cap through a threaded section, while the rotating connector can freely rotate on the threading unit, so when one end of the conduit is secured to one terminal, the other end of the conduit can still be rotated with the liquid-tight connector until it is secured to the other terminal.