National Stock Number
5120-01-003-1851
National Stock Number (NSN) 5120-01-003-1851, or NIIN 010031851, (installing tool,tube packing rin) was assigned April 12, 1975 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. 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.
This NSN is assigned to Item Name Code (INC) 05975. [AN ITEM DESIGNED TO INSERT PACKING RINGS ON TUBES WITHIN TUBE SHEETS ON CONDENSERS AND SIMILAR HEAT EXCHANGERS. IN OPERATION, THE PACKING RINGS ARE ASSEMBLED ON THE LOADING PIN MANDREL AND ARE THEN TRANSFERRED FROM THE MANDREL ON TO THE TUBE BY MEANS OF A TUBULAR SLEEVE WHICH SLIDES ON THE MANDREL.]. 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 5120010031851 does not contain precious metals.
This NSN is associated to Schedule B 8203206060: pincers and similar tools not pliers or tweezers, base metal. The Schedule B End Use is listed as photo, service industry machinery.
This information was last updated on May 01, 2025.