How many digits are in a National Stock Number (NSN)?

A National Stock Number (NSN) consists of 13 digits. This format is standardized and is used to identify items that are procured, stocked, stored, and issued by the U.S. Department of Defense and other federal agencies. The NSN is divided into four parts: the first two digits represent the logistics management systems that categorize the item, the next two digits specify the country of origin, and the final nine digits uniquely identify the specific item itself within that system. The 13-digit structure allows for comprehensive and organized inventory management, ensuring that items can be easily identified and tracked across numerous cataloging and supply systems. This uniformity is critical for the efficient operation of military supply chains.