The CTJ-3A-04[V003] is a 4-inch metallic rail from the DEUTSCH CTJ Series Common Termination System, engineered for robust wire termination in demanding aerospace, defense, and marine environments. Constructed from extruded aluminum alloy with stainless steel clips, this rail accommodates up to 2 modules (Sizes 22, 20, or 16) and features elongated mounting holes for easy installation with 10-32 screws. The rail has a frame capacity of 2.072 inches (dimension A) and 1.554 inches (dimension B), with a weight of 0.043 pounds, and is finished with nickel plating per the standard specification. The design provides versatile module mounting with positive locking retention and simple removal tooling, making it ideal for modular electronic distribution and feedback systems in high-reliability applications.