National Stock Number
                                            1680-01-254-3599
                                    
                                
                            
                            
                                National Stock Number (NSN) 1680-01-254-3599, or NIIN 012543599, (link assy) was assigned May 5, 1987 in the Federal Logistics Information System (FLIS).   This NSN does not replace any other NSNs. 
There are 2 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is 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 Oct 22, 2020. There have been 4 contracts issued for this part number, with 4 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE4A721P0742, SPE4A721P0742, SPE4A719P5345, SPE4A719P1741, SPE4A718PE291. The total value of the awarded contracts has been US$ 24,366.00. 
This NSN is very common among different weapons systems, belonging to 25 different platforms. 
There has been a small amount of 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, 2020, this NSN's acquisition method was noted as: Not established.  Not established. 
This NSN is assigned to Item Name Code (INC) 77777. Item has not been reviewed for Flight Safety Critical Aircraft Part (FSACP), Critical Safety Item (CSI), or Critical Application Item (CAI) purposes by an approved engineering authority. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1680012543599 contains an unknown precious metal. 
This NSN is associated to Schedule B 8803300060: other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof). The Schedule B End Use is listed as parts for military-type goods. NAICS classification category 336413: other aircraft parts and auxiliary equipment manufacturing. 
This information was last updated on Aug 01, 2025.