National Stock Number
5640-00-421-3818
National Stock Number (NSN) 5640-00-421-3818, or NIIN 004213818, (insulation sleeving,thermal) was assigned December 9, 1970 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 2 stock numbers: 5640013573997, 5640012388558.
There are 6 manufacturer part numbers associated with this NSN. 4 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers 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 unique to one weapons system.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Feb 15, 2005, this NSN's acquisition method was noted as: Not established. Not established.
This NSN is assigned to Item Name Code (INC) 13289. [A RIGID OR FLEXIBLE ITEM COMPOSED OF ONE OR MORE MATERIALS, HAVING UNIFORM INSIDE AND OUTSIDE DIAMETERS IN THE ENTIRE LENGTH. IT MAY BE FURNISHED IN SEGMENTS OR SPLIT-ROUND OR FULL-ROUND SECTIONS, COMPOSED OF ONE OR MORE LAYERS. IT IS SPECIFICALLY DESIGNED TO COVER PIPE, TUBING, AND LIKE SURFACES, TO RESTRICT THE TRANSFER OF HEAT FROM THE HIGH TEMPERATURE SURFACE TO THE LOW TEMPERATURE SURFACE. IT MAY ALSO INCLUDE PROTECTIVE COATINGS, JACKETS, ATTACHING CEMENT, ATTACHING BANDS, AND/OR ACCESSORIES, (EXCLUDING PREFABRICATED COMPONENTS USED IN AIRCRAFT APPLICATIONS). EXCLUDES:INSULATION PIPE COVERING, THERMAL, AIRCRAFT.]. 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 5640004213818 does not contain precious metals.
This information was last updated on Aug 01, 2025.