National Stock Number
5310-00-672-2178
National Stock Number (NSN) 5310-00-672-2178, or NIIN 006722178, (washer,saddle) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 6 stock numbers. Five of the National Stock Numbers that it replaces are: 5310011695573, 5310009127744, 5310001760784, 5310005790913, 5310006597550.
There are 30 manufacturer part numbers associated with this NSN. 11 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 19 suppliers. Today, 14 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 9 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 very common among different weapons systems, belonging to 83 different platforms.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jun 02, 2005, this NSN's acquisition method was noted as: Suitable for competitive acquisition for the first time. (Potential sources shall include dealers/distributors.) The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.
This NSN is assigned to Item Name Code (INC) 15898. [A WASHER WITH ONE SURFACE SHAPED TO FIT A SIMILARLY CURVED SURFACE, THE OTHER SURFACE OF THE WASHER BEING EITHER PARALLEL WITH THE SHAPED SURFACE OR IN THE FORM OF RAISED BOSS HAVING EITHER A FLAT BEARING SURFACE OR A RECESS DESIGNED FOR HOLDING A NUT. EXCLUDES:WASHER (1), CONCAVE AND WASHER (1), CONVEX.]. 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 5310006722178 contains an unknown precious metal.
This NSN is associated to Schedule B 7318220000: washers other than lock washers, iron or steel. The Schedule B End Use is listed as finished metal shapes. NAICS classification category 332722: bolt, nut, screw, rivet, and washer manufacturing.
This information was last updated on Aug 01, 2025.