NSN 6685-01-439-4890, 6685014394890
THERMOSTAT,FLOW CONTROL

Federal Supply Classification: FSC 6685 - Pressure, Temperature, and Humidity Measuring and Controlling Instruments
National Item Identification Number: NIIN 014394890
Codification Country: United States
Item Name Code: INC 16516
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (P) 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.

Availability: Readily Available Qualified Suppliers: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 6685-01-439-4890

National Stock Number (NSN) 6685-01-439-4890, or NIIN 014394890, (thermostat,flow control) was assigned December 10, 1996 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 3 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, there are no suppliers listed as an Active supplier 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, with the most recent procurement date of Feb 07, 2014. There have been 2 contracts issued for this part number, with 2 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 2 different suppliers. The last contract numbers awarded were: SPE4A014M0528, SPE4A014M0528, SPE4A114V0086. The total value of the awarded contracts has been US$ 1,340.00.

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 May 14, 2009, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The data needed to produce this item from additional sources is not physically available. Valid AMCs: 3, 4 and 5.

This NSN is assigned to Item Name Code (INC) 16516. [AN AUTOMATIC REGULATING DEVICE WHICH CONTROLS THE FLOW OF FLUIDS OR GASES BY ACTUATING A VALVE OR SHUTTER FOR HEATING OR COOLING PURPOSES. MAY BE ADJUSTABLE, OR SET TO OPERATE AT A DEFINITE PRESSURE. EXCLUDES:CONTROL, HUMIDITY; CONTROL, TEMPERATURE INDICATING; AND SWITCH, THERMOSTATIC.]. 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 6685014394890 does not contain precious metals.

This information was last updated on Jul 01, 2025.

Technical Characteristics

SPECIAL FEATURES: (FEAT) 24-30 VAC;2 STAGE,HEAT/COOL WITH AUTO CHANGE OVER;TEMP.: HEAT RISES TO 60 DEG F. AND COOLING RESET TO 85 DEG F.;MODEL TMD NEW FEATURES HAVE BEEN ADDED TO THE TMC LINE OF LIGHTSTATS FOR IMPROVED PERFORMANCE AND ADDITIONAL ENERGY REDUCTION.