Abstract: Embodiments of a threaded component locking apparatus for preventing inadvertent disconnection of the male and female connection are disclosed. One embodiment includes an annular groove around the male member spaced from its threads and a ring shaped retainer disposed in the annular groove. A rear lip on the female threaded component interferes with the ring shaped retainer to prevent loosened connection between the components from becoming completely disconnected. Another embodiment utilizes a C-clip retainer member to limit loosening of the connection. Another embodiment utilizes a canted spring ring to interfere with and limit loosening of the connection. Another embodiment has a pair of collar halves that fit around the male member each having an annular groove for receiving a canted spring ring or ring shaped retainer to interfere with a rear lip on the female threaded component to limit loosening of the connection.