National Stock Number (NSN) 1660-01-165-7193, or NIIN 011657193, (insulation pipe covering,thermal) was assigned November 3, 1983 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 7 manufacturer part numbers associated with this NSN. 4 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 8 suppliers. Today, 8 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 been procured by the US Government within the last year, but shows no recent (last 90 days) procurement activity. There have been 31 contracts issued for this part number, with 35 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 5 different suppliers. The last contract numbers awarded were: SPE4A725F5930, SPE4A725F2935, SPE4A725F1482, SPE4A724F8654, SPE4A724F6977. The total value of the awarded contracts has been US$ 262,992.43.
This NSN is unique to one weapons system.
There has been a small amount of 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 Oct 11, 2013, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 51593. [AN ITEM COMPOSED OF ONE OR MORE MATERIALS, MOLDED, COMPRESSED, AND/OR BAKED INTO A RIGID COVERING OF IRREGULAR SHAPES AND SIZES. IT IS DESIGNED TO COVER AIR DUCTS AND/OR AIR DUCT FITTINGS USED IN AIR CONDITIONING, HEATING, COOLING, PRESSURIZING, DE-ICING SYSTEMS AND IN HYDRAULIC SYSTEMS TO RESTRICT THE DISSIPATION OF HEAT. IT MAY COMPLETELY OR PARTIALLY ENCASE THE ITEM FOR WHICH DESIGNED. IT MAY BE FURNISHED WITH OR WITHOUT FILLERS, CEMENT, AND/OR SEPARATE OR ATTACHED ACCESSORIES FOR INSTALLATION, (EXCLUDING FLEXIBLE AIR DUCT COVERING AND RIGID PIPE AND PIPE FITTING COVERINGS USED IN CONSTRUCTION AND BUILDING MATERIALS). EXCLUDES:INSULATION BLANKET,THERMAL,AIRCRAFT; INSULATION PIPE FITTING COVERING,THERMAL; AND INSULATION SLEEVING,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 data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1660011657193 does not contain precious metals.
This information was last updated on Aug 01, 2025.