In addition, all of the AT Series connectors have been developed to be compatible with all other existing standard products industry-wide.. Amphenol Sine Systems AT Series connectors are designed as an IP68/69K rated mated, high-performance, cost-effective, thermoplastic solution with superior environmental seals, seal retention capabilities and are designed for use with 14-22AWG with size 16 contacts handling up to 13A.12C FLNG PN REC A KEY W/C GRY Also available in BoardLock, StructurePlus, HYPERBUSS and PanelMate Series connectors.