A National Stock Number (NSN) is a 13-digit code assigned to an item of supply that is repeatedly procured, stocked, and stored throughout the federal supply system. For government agencies, defense sectors, allied nations, and more, NSNs serve as the universal language of logistics. Because of this, distributors who handle NSN-identified items play a very important role in keeping defense operations running as intended. In this blog, we will explore what sets NSN parts distributors apart from standard suppliers and why their expertise is essential to the strength of modern defense supply chains.