National Stock Number
5999-01-689-6257
National Stock Number (NSN) 5999-01-689-6257, or NIIN 016896257, (cooling unit,electronic equipmen) was assigned June 30, 2020 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 4 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are 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) 66977. [A UNIT DESIGNED TO GENERATE AND CIRCULATE COOL AIR FOR THE PURPOSE OF MAINTAINING ELECTRONIC EQUIPMENT AT A SPECIFIC OPERATING TEMPERATURE. IT INCLUDES A BLOWER, POWER CONDITIONER, AIR PLENUM, AND POWER HOUSING. IT CAN INCLUDE AN ELAPSED TIME INDICATOR TO INDICATE THE CUMULATIVE NUMBER OF OPERATING HOURS. THE UNIT PROVIDES STATUS AND CONTROL VIA THE POWER SUPPLY ASSEMBLY. EXCLUDES:COOLER, AIR, ELECTRONIC EQUIPMENT; COOLER, FLUID, ELECTRONIC EQUIPMENT; AND FAN (AS MODIFIED).]. 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 5999016896257 does not contain precious metals.
This NSN is associated to Schedule B 8543909000: electrical machines and apparatus parts, nesoi. The Schedule B End Use is listed as electric apparatus. NAICS classification category 335999: all other miscellaneous electrical equipment and component manufacturing.
This information was last updated on Jul 01, 2025.