The G-KS-KS-MLK-T adapter is designed to connect two housings together and permit the desired alignment of equipment during installation. The locking feature of this rotational adapter is achieved with internal mating teeth. No jam nuts are required for equipment alignment making installation easy and reliable. The locking teeth remove any rotational forces from the coupling nut reducing the possibility of loose connections and RF leakage.
See the Multicom Trunk Connectors here