This series of aviation connectors is divided into three categories. The Y50X is in metric dimensions, with a larger shell size for the same core count. The socket installation methods include disk-type, nut-tightened, and wall-through. The termination type is welding. Materials such as stainless steel, copper, and aluminum alloys are chosen based on the usage environment. They are generally used for strategic and tactical systems, electronic countermeasures systems, communication signal connection systems, and electrical and telecommunication signal connections for imported medical equipment and devices.