National Stock Number
4240-01-268-0551
National Stock Number (NSN) 4240-01-268-0551, or NIIN 012680551, (cartridge,respirator,air filtering) was assigned November 21, 1987 in the Federal Logistics Information System (FLIS). NIIN 012680551 was cancelled on September 2, 1998, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 4240012680556. 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) 10101. [A SELF-CONTAINED UNIT DESIGNED FOR PLACEMENT IN THE HOLDER OF A RESPIRATOR OR AIR LINE MASK. IT MAY CONSIST OF A FILTERING ELEMENT OF FIBROUS MATERIAL SUCH AS FELT, PAPER, OR THE LIKE SECURED BETWEEN TWO END PLATES; OR IT MAY BE A CYLINDRICAL CONTAINER OF LIGHT WEIGHT CONSTRUCTION HAVING FLAT OR SLIGHTLY ROUNDED ENDS WHICH MAY BE EITHER PERFORATED OR OF WIRE MESH, FILLED WITH CHARCOAL OR CHEMICALS WHICH ABSORB CONTAMINANTS FROM THE AIR PASSING THROUGH IT. SEE ALSO FILTER, RESPIRATOR, AIR FILTERING.]. This item has critical features such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 4240012680551 does not contain precious metals.
This information was last updated on Jul 01, 2025.