National Stock Number
4240-00-540-2404
National Stock Number (NSN) 4240-00-540-2404, or NIIN 005402404, (mask,gas) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 3 stock numbers: 4240006400691, 4240002898072, 4240002689733.
There are 10 manufacturer part numbers associated with this NSN. 8 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 6 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Feb 02, 2011, this NSN's acquisition method was noted as: Not established. Not established.
This NSN is assigned to Item Name Code (INC) 10097. [AN INDIVIDUAL RESPIRATORY PROTECTIVE DEVICE HAVING A CANISTER, GAS MASK AS THE AIR PURIFYING ELEMENT; DESIGNED TO PROTECT THE WEARER AGAINST INHALATION OF GASES, FUMES AND SMOKES. THE FACEPIECE MAY BE CONNECTED TO THE CANISTER BY A FLEXIBLE HOSE, OR IT MAY BE DESIGNED FOR ATTACHING DIRECTLY TO THE CANISTER. EXCLUDES:RESPIRATORY PROTECTIVE DEVICES DESIGNED TO REGENERATE EXPIRED AIR. EXCLUDES:MASK, OXYGEN; MASK, AIR LINE; MASK, CHEMICAL-BIOLOGICAL AND RESPIRATOR, AIR FILTERING.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. 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 4240005402404 does not contain precious metals.
This information was last updated on Aug 01, 2025.