National Stock Number
5220-01-187-9374
National Stock Number (NSN) 5220-01-187-9374, or NIIN 011879374, (toolmaker's flat) was assigned August 27, 1984 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Feb 07, 2019, 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 or the rights to use the data needed to purchase this part from additional sources are not owned by the Government and it has been determined that it is uneconomical to purchase them. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 18275. [A FLAT, HARDENED PIECE OF STEEL, HAVING MICROFINISHED PARALLEL SURFACES CAPABLE OF ADHERING TO EACH OTHER WHEN TWO OR MORE FLATS ARE FIRMLY PRESSED (WRUNG) TOGETHER. IT IS USED FOR INSPECTION AND LAYOUT OPERATIONS REQUIRING EXTREME ACCURACY. SEE ALSO OPTICAL FLAT.]. 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 5220011879374 does not contain precious metals.
This information was last updated on Aug 01, 2025.