National Stock Number (NSN) 6680-00-364-3506, or NIIN 003643506, (adaptor,tachometer) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). This NSN replaces 2 stock numbers: 4730001799816, 6680006741330.
There are 4 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 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, with the most recent procurement date of Dec 19, 2019. There have been 2 contracts issued for this part number, with 2 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 2 different suppliers. The last contract numbers awarded were: SPE4A120P0361, SPE4A619V272C. The total value of the awarded contracts has been US$ 39,465.10.
This NSN is fairly common among different weapons systems, belonging to 13 different platforms.
There has been a small amount of demand for this national stock number. Globally, demand for this NSN has originated from 6 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Aug 03, 2010, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The Government does not have adequate data, lacks rights to data, or both, needed to purchase this part from additional sources. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 77777. 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 6680003643506 does not contain precious metals.
This NSN is associated to Schedule B 9031900000: parts & accessories of machines, nesoi in this chapter and for profile projectors. The Schedule B End Use is listed as measuring, testing, control instruments. NAICS classification category 333314: optical instrument and lens manufacturing.
This information was last updated on Aug 01, 2025.