2102866-1 is a 12-fiber multimode MT ferrule kit designed for use with VITA 66.1 backplane fiber optic connector systems. This ferrule kit is intended for integration with the backplane module (PN 2000973-1) and supports expanded beam fiber optic connectivity in ruggedized environments. The connector system accommodates up to two MT ferrules and features locating posts to ensure proper positioning on backplane and module boards. The receptacle connector insert provides ±0.25 mm planar floating alignment capability for reliable blind-mating connections. Common applications include high-density fiber optic backplane interconnects in military, aerospace, and harsh environment systems where robust optical performance is required.