What is the term for the 13-digit number used for item identification in the supply distribution system of the U.S.?

The term for the 13-digit number used for item identification in the supply distribution system of the U.S. is indeed the National Stock Number. This standardized number is critical for the logistics and supply chain operations within the Department of Defense and other federal agencies, as it facilitates the management and tracking of inventory across various service branches.

The National Stock Number (NSN) uniquely identifies items of supply, ensuring that all parties involved in procurement, inventory management, and distribution can accurately refer to the specific item in question. This helps streamline processes, reduce errors, and improve overall efficiency in the procurement and supply chain system.

Each NSN consists of four parts, comprising the Federal Supply Class and a unique item identification number, which supports a systematic approach to item classification and inventory tracking. By using NSNs, the military and related organizations can maintain a comprehensive catalog of supplies, making it easier to order, replace, and manage assets needed for operations.