At ASAP Semiconductor we have an extensive inventory of NSN parts. To standardize the process, the U.S. Department of Defense created a system that distinctively and permanently recognizes the items that it buys.
National Stock Numbers are 13-digit numeric codes assigned to all items that are procured, stocked, and distributed by the federal supply chain. The 13-digit code can be split into various subcategories:
Federal Supply Classification Group (FSCG) - The first 4-digits of the NSN. This is split into the FSG and the FSC.
Federal Supply Group (FSG) - The first 2-digits of the NSN.
Federal Supply Classification (FSC) - The second 2-digits of the NSN
We supply Federal Supply Group 41 which is recognized by the DLA as Refrigeration and Air Conditioning Equipment.
The corresponding FSCs include:
FSC 4150 Vortex Tubes and Other Related Cooling Tubes