National Stock Number
                                            4140-01-556-0758
                                    
                                
                            
                            
                                National Stock Number (NSN) 4140-01-556-0758, or NIIN 015560758, (guard,fan impeller) was assigned September 24, 2007 in the Federal Logistics Information System (FLIS).  NIIN 015560758 was cancelled on March 2, 2016, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs. 
There are no manufacturer part numbers associated to this NSN.  
This part number has not been procured by the US Government in over 5 years. 
This NSN is unique to one weapons system. 
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 Apr 06, 2020, 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) 36295. [A SAFETY DEVICE SPECIFICALLY DESIGNED TO PROTECT OR SHIELD A FAN IMPELLER FROM PHYSICAL DAMAGE AND/OR PREVENT POSSIBLE INJURY TO PERSONNEL WHILE THE FAN IS IN OPERATION. IT MAY CONSIST OF A WIREGUARD, SCREEN, GRILLE AND THE LIKE. EXCLUDES COVER, ELECTRIC FAN AND GRILLE, METAL.]. 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 4140015560758 does not contain precious metals. 
This information was last updated on Aug 01, 2025.