National Stock Number
5640-01-237-6609
National Stock Number (NSN) 5640-01-237-6609, or NIIN 012376609, (insulation board,thermal) was assigned August 5, 1986 in the Federal Logistics Information System (FLIS). NIIN 012376609 was cancelled on December 15, 2017, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There are 3 manufacturer part numbers associated with this NSN. 3 of those 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.
This NSN is assigned to Item Name Code (INC) 15118. [AN ITEM IDENTICAL IN CONSTRUCTION TO INSULATION BLOCK, THERMAL EXCEPT THAT IT IS SUPPLIED IN LENGTHS GREATER THAN 36 INCHES (914.4 MM). EXCLUDES:BUILDING BOARD (AS MODIFIED). MILLBOARD, ASBESTOS; ASBESTOS SHEET, COMPRESSED; CORK SHEET; CORK AND RUBBERSHEET; AND FIBERBOARD (AS MODIFIED). SEE ALSO INSULATION BLANKET, THERMAL.]. 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 5640012376609 does not contain precious metals.
This information was last updated on Aug 01, 2025.