National Stock Number (NSN) 5999-01-221-8524, or NIIN 012218524, (heater,thermal release) was assigned December 4, 1985 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 5999011551397.
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, 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, with the most recent procurement date of Mar 20, 2013. There have been 3 contracts issued for this part number, with 3 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 3 different suppliers. The last contract numbers awarded were: SPM7M913V2224, SPM7M513M1379, SPM7M911V7766. The total value of the awarded contracts has been US$ 1,907.41.
This NSN is somewhat common among different platforms, belonging to 4 different weapons systems.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. The 24 month forecast from the US Government for this part number has high volatility, with an estimated forecasted value of US$ 2,420. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jul 27, 2011, 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) 60584. [A RESISTIVE ELEMENT WHICH DISSIPATES SUFFICIENT HEAT TO MELT THE FUSIBLE MATERIAL OR DISTORT THE BIMETALLIC ELEMENT OF AN OVERLOAD PROTECTIVE DEVICE WHEN THE TEMPERATURE, AS A RESULT OF AN OVERLOAD IN AN ELECTRICAL CIRCUIT, REACHES A PREDETERMINED VALUE. EXCLUDES COIL (AS MODIFIED); HEATING ELEMENT, ELECTRICAL; RESISTANCE ELEMENT; RESISTOR, THERMAL; THERMAL RELEASE, CIRCUIT BREAKER; AND ITEMS WITH INTEGRAL BIMETALLIC ELEMENT, CONTACTS, OR FUSIBLE MATERIAL.]. 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 5999012218524 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 Aug 01, 2025.