National Stock Number
3439-00-840-3615
National Stock Number (NSN) 3439-00-840-3615, or NIIN 008403615, (heat sink,soldering aid) was assigned December 16, 1966 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. 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.
This NSN is somewhat common among different platforms, belonging to 3 different weapons systems.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 27, 2007, 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 Government physically does not have in its possession sufficient, accurate, or legible data to purchase this part from other than current source(s). (NOTE: This code is applicable only to parts under immediate buy requirements and only as long as the deficiency is under review for resolution and appropriate recoding.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 61653. [AN ITEM FOR DISSIPATING HEAT DURING SOLDERING OPERATIONS WHICH INCORPORATES EITHER A LIQUID ABSORBENT IN THE FORM OF FOAM OR GEL, OR A METALLIC ABSORBENT. THE METALLIC ABSORBENT IS DESIGNED FOR ATTACHMENT TO HEAT SENSITIVE COMPONENTS, SUCH AS DIODES OR TRANSISTORS, TO PREVENT THERMAL CHANGES. EXCLUDES:HEAT SINK, ELECTRICAL-ELECTRONIC COMPONENTS.]. 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 3439008403615 contains an unknown precious metal.
This NSN is associated to Schedule B 8468901000: parts of hand-directed or controlled machinery and apparatus for soldering, brazing, welding or surface tempering, other than those of heading 8515. The Schedule B End Use is listed as photo, service industry machinery. NAICS classification category 333992: welding and soldering equipment manufacturing.
This information was last updated on Aug 01, 2025.