National Stock Number
5310-00-660-3398
National Stock Number (NSN) 5310-00-660-3398, or NIIN 006603398, (nut,self-locking,hexagon) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). NIIN 006603398 was cancelled on January 2, 2009, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 5310008892544. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 16 suppliers. Today, 10 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 8 suppliers are 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 unique to one weapons system.
This NSN is assigned to Item Name Code (INC) 05277. [A NUT HAVING A FLAT BOTTOM AND 6 SIDES. AN INTEGRAL FEATURE IS INCORPORATED FOR LOCKING ON THE THREADS OF A MATING MEMBER. EXCLUDES:NUT (1), SELF-LOCKING, CAP.]. 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 5310006603398 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.