National Stock Number
4240-01-398-1437
National Stock Number (NSN) 4240-01-398-1437, or NIIN 013981437, (mask,chemical-biological) was assigned October 26, 1994 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. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 10, 2013, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part is a commercial/non-developmental/off-the-shelf-item. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 22753. [AN INDIVIDUAL RESPIRATORY PROTECTIVE DEVICE CONSISTING PRINCIPALLY OF A FACEPIECE OR MUZZLE-PIECE, AND CANISTER OR FILTER ELEMENTS. IT IS DESIGNED TO PROTECT THE RESPIRATORY SYSTEM AND FACE OF PERSONNEL OR ANIMALS AGAINST CHEMICAL OR BIOLOGICAL CONTAMINATION. EXCLUDES:MASK,AIR LINE; MASK,GAS; MASK,OXYGEN; MASK,RIOT CONTROL AGENT; 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 4240013981437 does not contain precious metals.
This information was last updated on Aug 01, 2025.