National Stock Number
4240-01-249-5491
National Stock Number (NSN) 4240-01-249-5491, or NIIN 012495491, (respirator,air filtering) was assigned February 12, 1987 in the Federal Logistics Information System (FLIS). NIIN 012495491 was cancelled on May 2, 2003, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN replaces 1 stock number, 4240012495365.
There are 3 manufacturer part numbers 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, there are no suppliers listed as an Active supplier for this NSN. Of the active suppliers, there are no suppliers that are 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) 17294. [AN INDIVIDUAL RESPIRATORY PROTECTIVE DEVICE, DESIGNED TO REMOVE ORGANIC VAPORS, SOLID PARTICLES AND/OR LIGHT CONCENTRATIONS OF POISONOUS GAS IF WITH CHEMICAL CARTRIDGE(S). IT MAY INCLUDE A HOOD DESIGNED TO COVER USER'S HEAD.]. 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 4240012495491 does not contain precious metals.
This information was last updated on Aug 01, 2025.