Description of NSN Part Types

The United States of America uses the National Stock Number (NSN) as an identification number to categorize goods and parts. NSN parts come in a variety of forms, including mechanical and electronic components. These components are grouped according to their particular purpose, such as engines, fasteners, tools, or safety equipment. In order to facilitate their identification, management, and tracking in government inventories, each NSN part is given a number. Because they maintain uniformity and compatibility, NSN parts are essential in both military and commercial applications. Logistics and procurement in aerospace as well as defense can benefit from an awareness of the various NSN product types.