National Stock Number
4240-01-683-1385
National Stock Number (NSN) 4240-01-683-1385, or NIIN 016831385, (filter element set,chemical-biol) was assigned September 10, 2019 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 2 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 2 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.
This NSN is assigned to Item Name Code (INC) 31523. [AIR FILTERING DEVICES, ESPECIALLY DESIGNED TO BE INSERTED IN THE FACEPIECE OF THE MASK. THE FILTERS REMOVE FROM THE AIR PASSING THROUGH THEM TOXIC AND/OR IRRITATING CHEMICAL VAPORS, GASES, AND PARTICULATE CONTAMINANTS (DUSTS, FUMES, MISTS, FOGS, AND SMOKE), INCLUDING BIOLOGICAL ORGANISMS LIKELY TO BE USED IN WARFARE. THEY MAY FILTER INDUSTRIAL DUSTS, FUMES, MISTS, FOGS, AND SMOKE, BUT ARE NOT DESIGNED TO REMOVE INDUSTRIAL TYPE GASES OR VAPORS.]. 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 4240016831385 does not contain precious metals.
This information was last updated on Jun 01, 2025.