National Stock Number
5220-00-421-8752
National Stock Number (NSN) 5220-00-421-8752, or NIIN 004218752, (plate,surface) was assigned December 18, 1970 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers associated with this NSN. One of those 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. ISO Group has several sources of supply for this NSN.
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 Mar 20, 2018, 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) 18012. [A RECTANGULAR OR SQUARE PRECISION TOOL HAVING A FLAT WORKING SURFACE(S) OF SPECIFIC FLATNESS. IT IS USED AS A DATUM PLANE IN CONNECTION WITH VARIOUS LAYOUT, INSPECTION, AND CALIBRATION OPERATIONS. IT MAY ALSO BE USED AS A LAPPING PLATE, BUT IS NOT GROOVED. SEE ALSO BLOCK, LAPPING; PLATE, DUPLEX, SURFACE AND LAPPING; AND PLATE, LAPPING.]. 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 5220004218752 does not contain precious metals.
This information was last updated on Jul 01, 2025.