National Stock Number
5999-01-660-0861
National Stock Number (NSN) 5999-01-660-0861, or NIIN 016600861, (cooling unit,electronic equipment) was assigned January 5, 2017 in the Federal Logistics Information System (FLIS). NIIN 016600861 was cancelled on September 2, 2019, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There are 2 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, there are no suppliers that are deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 06, 2020, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) Acquisition of this part is restricted to source(s) specified on "Source Control", "Altered Item" or "Selected Item" drawings/documents. Valid AMCs: 1, 2, 3, 4 and 5.
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 5999016600861 does not contain precious metals.
This information was last updated on Jul 01, 2026.