National Stock Number
5310-00-138-6374
National Stock Number (NSN) 5310-00-138-6374, or NIIN 001386374, (washer,concave) was assigned August 18, 1971 in the Federal Logistics Information System (FLIS). NIIN 001386374 was cancelled on August 2, 2008, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 5310014379757. This NSN replaces 1 stock number, 5310004621079.
There are 4 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 5 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 4 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 assigned to Item Name Code (INC) 15930. [A WASHER WHICH IS ROUND WITH A CENTRALLY LOCATED HOLE. ONE BEARING SURFACE IS SMOOTH, FLAT, AND UNBROKEN, THE OTHER BEARING SURFACE IS SMOOTH, UNBROKEN, AND IS RECESSED TO FORM A CURVED OR SPHERICAL CONTOUR. SEE ALSO WASHER (1), CONVEX. EXCLUDES:WASHER (1), RECESSED AND BEARING, WASHER, THRUST.]. 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 5310001386374 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.