National Stock Number
5310-01-556-6538
National Stock Number (NSN) 5310-01-556-6538, or NIIN 015566538, (nut,self-locking,extended washer,round) was assigned October 3, 2007 in the Federal Logistics Information System (FLIS). NIIN 015566538 was cancelled on January 2, 2009, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 5310005949379. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are 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) 36744. [A NUT, CIRCULAR IN SHAPE, HAVING WRENCHING FACILITIES SUCH AS FLATS, HOLES, PROTRUSIONS, SLOTS OR SPLINES IN OR ON THE PERIPHERY. IT HAS AN INTEGRAL WASHER WHICH EXTENDS BEYOND THE WRENCHING ELEMENT PERIPHERY AND AN INTEGRAL FEATURE IS INCORPORATED FOR LOCKING ON THE THREADS OF A MATING MEMBER.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5310015566538 does not contain precious metals.
This information was last updated on Aug 01, 2025.