National Stock Number
                                            2815-01-391-9925
                                    
                                
                            
                            
                                National Stock Number (NSN) 2815-01-391-9925, or NIIN 013919925, (cylinder head,diesel engine) was assigned June 21, 1994 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs. 
There are 2 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 2 suppliers are listed as Active suppliers 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. 
This NSN is somewhat common among different platforms, belonging to 3 different weapons systems. 
  Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Sep 02, 2005, this NSN's acquisition method was noted as: Not established.  Not established. 
This NSN is assigned to Item Name Code (INC) 60370. [AN ITEM DESIGNED TO INCLOSE THE CYLINDER BORE(S) OF AN ENGINE BLOCK TO FORM A COMBUSTION CHAMBER(S). IT MAY HAVE LIQUID COOLING PASSAGE(S) AND/OR AIR COOLING FIN(S) AND MAY INCLUDE VALVE(S), VALVE GUIDE(S), ROCKER ARM(S), INJECTOR TUBE(S), AND THE LIKE. IT IS A COMPONENT PART OF AN ENGINE, DIESEL. SEE ALSO CYLINDER HEAD, GASOLINE ENGINE.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 2815013919925 does not contain precious metals. 
This NSN is associated to Schedule B 8409998000: parts for compression-ignition internal combustion piston engines (diesel), nesoi. The Schedule B End Use is listed as industrial engines. NAICS classification category 333618: other engine equipment manufacturing. 
This information was last updated on Aug 01, 2025.