DLMS™ Summary National Stock Number 1005-00-396-1905 National Stock Number (NSN) 1005-00-396-1905, or NIIN 003961905, (gun,automatic,20 millimeter) was assigned January 1, 1960 in the Federal Logistics Information System (FLIS). NIIN 003961905 was cancelled on August 22, 2002, with a cancelled status of "Item is Cancelled - Inactive." 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 assigned to Item Name Code (INC) 21596. [A COMPLETE ASSEMBLY CONSISTING OF A BARREL, BREECH, AND FIRING MECHANISMS DESIGNED TO BE FIRED FROM A MOUNT ON A SELF-PROPELLED VEHICLE.]. This item does not have a critical feature such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1005003961905 contains an unknown precious metal. This information was last updated on Oct 28, 2016.