National Stock Number
5999-01-721-6421
National Stock Number (NSN) 5999-01-721-6421, or NIIN 017216421, (reservoir,coolant fluid,electron) was assigned June 22, 2024 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 67549. [A CONTAINER WHICH IS PART OF A COOLER, FLUID, ELECTRONIC EQUIPMENT. IT IS DESIGNED TO COLLECT EXCESS COOLANT FLUID WHEN THE FLUID EXPANDS DUE TO TEMPERATURE RISE.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 5999017216421 does not contain precious metals.
This information was last updated on Aug 01, 2025.