National Stock Number
5310-00-186-0978
National Stock Number (NSN) 5310-00-186-0978, or NIIN 001860978, (washer,key) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 46 manufacturer part numbers associated with this NSN. 20 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 28 suppliers. Today, 15 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 13 suppliers are deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years, with the most recent procurement date of Dec 07, 2017. There has been one contract issued for this part number, with one award given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE5E818P0773. The total value of the awarded contracts has been US$ 850.25.
This NSN is somewhat common among different platforms, belonging to 10 different weapons systems.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. 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. (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) 01869. [A WASHER OF NONRESILIENT MATERIAL USUALLY HAVING TWO PARALLEL BEARING SURFACES. THE OUTSIDE AND/OR INSIDE EDGES HAVE ONE OR MORE PROTUBERANCES. THE ENDS AND/OR EDGES MAY BE PREBENT AT ANY ANGLE OR THE PROTUBERANCES MAY BE PREBENT AT ANY ANGLE TO THE BEARING SURFACES. THE KEYS OR LUGS MAY BE FITTED INTO KEYWAYS IN ADJACENT MATERIAL OR THEY MAY BE BENT OVER AFTER APPLICATION TO HOLD OR LOCK ONE OR MORE ITEMS IN PLACE. EXCLUDES:THRUST TYPE WASHER.]. 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 5310001860978 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 Jun 01, 2025.