How many digits does a National Stock Number (NSN) consist of?

A National Stock Number (NSN) consists of 13 digits. This system is used to identify items that are purchased, stocked, stored, and issued within the Department of Defense and other government agencies. The structure of the NSN is designed to provide a unique identifier for each item, ensuring that each item is distinctly traceable.

The NSN consists of four parts: the first part is the Federal Supply Class (FSC), which is a four-digit code that categorizes the type of item; the next part is the National Item Identification Number (NIIN), which is made up of nine digits. Together, these components form a 13-digit number, facilitating efficient logistics and management of inventory across various military and governmental operations.

Understanding this numbering system is critical in aviation and defense logistics, as it helps in ensuring that the correct parts and materials are available for maintenance and repair operations.