National Stock Number
5310-01-556-4491
National Stock Number (NSN) 5310-01-556-4491, or NIIN 015564491, (washer,lock) was assigned October 3, 2007 in the Federal Logistics Information System (FLIS). NIIN 015564491 was cancelled on September 2, 2008, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 5310015529670. 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. 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.
This NSN is assigned to Item Name Code (INC) 14218. [A WASHER, USUALLY ROUND, WITH A CENTRALLY-LOCATED HOLE. ITS EDGES AND TWO BEARING SURFACES ARE DESIGNED IN SUCH A WAY THAT APPLIED PRESSURE BRINGS INTO PLAY THE SPRING TENSION AND/OR FRICTIONAL LOCKING PRINCIPLE THAT MATERIALLY RESISTS ANY TENDENCY TOWARD TURNING. IT MAY BE MADE OF ONE OR TWO PIECES.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5310015564491 does not contain precious metals.
This information was last updated on Jul 01, 2025.