What is a Part Number and What Does it Do?

Part numbers are unique identifiers assigned to each component used in a product.

Part numbers are used to help distinguish between similar parts, and are essential in the manufacturing process. This article explains the importance of part numbers and how they are used. Part numbers are unique identifiers assigned to each individual component used in the production of a product.

NATO Part Number
NATO Part Number

NATO Part Number Search

Search for NATO Stock Numbers in NMCRL by Part Number


  • A part number is an alphanumeric code used to identify a specific part or component.
  • It is used to differentiate between similar parts or components.
  • It is also used to help identify which part or component is needed for a given application.

Benefits of Knowing Part Numbers

  • Easily identify the right part for a specific application.
  • Accurately order parts for repairs or replacements.
  • Track inventory levels of parts and components.

Where to Find Part Numbers

  • Product documentation and technical manuals (TM).
  • Manufacturer websites.
  • Online part catalogs.
  • MCRL


Part numbers are an essential tool for identifying and ordering parts and components. Knowing part numbers is beneficial for accurately ordering and tracking parts. Part numbers can be found in product documentation, manufacturer websites, and online part catalogs. The MCRL and NMCRL both provide references between National Stock Numbers, NATO Stock Numbers and Part Numbers.