Which of the following is NOT part of the MCN anatomy?

• A. Federal Supply Class (FSC)
• B. National Codification Bureau (NCB)
• C. Procurement Methods Code (PMC)
• D. National Stock Number (NSN)

Answer: (D)

The MCN anatomy is built from three elements: the Federal Supply Class (FSC), which groups like items together; the National Codification Bureau (NCB), which handles the codification and classification framework; and the Procurement Methods Code (PMC), which indicates how the item is acquired. The National Stock Number (NSN) serves as the item’s stock-keeping identifier, created from those classification elements, but it is not itself a component of the MCN’s internal structure. In practice, FSC, NCB, and PMC define how an item is managed and procured, while the NSN is the reference number used to reference that item across catalogs and inventories. So the one not part of the MCN anatomy is the National Stock Number.