National Stock Number (NSN) 5970-00-497-8520, or NIIN 004978520, (insulator,disk) was assigned July 9, 1971 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 5970012794896.
There are 4 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 7 suppliers. Today, 5 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is 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 6 contracts issued for this part number, with 6 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: SPE4A625V2972, SPE4A624PAM97, SPE4A421P0216, SPE4A618P9146, SPE4A617PJ346. The total value of the awarded contracts has been US$ 20,938.47.
This NSN is very common among different weapons systems, belonging to 30 different platforms.
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 Mar 21, 2020, 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) 18295. [AN INSULATOR THAT IS ESSENTIALLY THIN, FLAT, AND ROUND IN SHAPE, WITH OR WITHOUT HOLES. THE GENERAL SHAPE MAY VARY BY THE ADDITION OF SUCH FEATURES AS BEVELED EDGES, INDENTED SURFACES, THROUGH-HOLE KEY AND/OR PERIPHERAL FLATS. IT MAY HAVE ONE OR MORE HOLES OFF CENTER; IF THERE ARE TWO OR MORE HOLES, ONE MAY BE CENTRALLY LOCATED. EXCLUDES:MOUNTING PAD, ELECTRICAL-ELECTRONIC COMPONENT.]. 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 5970004978520 does not contain precious metals.
This NSN is associated to Schedule B 8546900000: electrical insulators, nesoi. The Schedule B End Use is listed as electric apparatus. NAICS classification category 326199: all other plastics product manufacturing.
This information was last updated on Jul 01, 2025.