National Stock Number
5210-00-439-2021
National Stock Number (NSN) 5210-00-439-2021, or NIIN 004392021, (micrometer,reading) was assigned November 28, 1969 in the Federal Logistics Information System (FLIS). NIIN 004392021 was cancelled on April 30, 2010, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. 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.
This NSN is assigned to Item Name Code (INC) 77777. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5210004392021 does not contain precious metals.
This information was last updated on Aug 01, 2025.