National Stock Number
4240-12-170-3394
National Stock Number (NSN) 4240-12-170-3394, or NIIN 121703394, (filter unit,gas-particulate) has an unknown assigned date. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 3 suppliers are listed as Active suppliers 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) 19445. [A UNIT CONSISTING OF A POWER DRIVEN FAN OR BLOWER, GAS AND PARTICULATE FILTER(S), OR GAS-PARTICULATE FILTER ASSEMBLY. IT IS USED FOR REMOVING BIOLOGICAL, CHEMICAL, AND RADIOLOGICAL CONTAMINANTS FROM AIR SUPPLIED TO BUILDINGS, SHELTERS, TRAILER VANS, AND THE LIKE, OR TO INDIVIDUAL HOSE CONNECTED FACE MASKS AND/OR HEADPIECES.].
This information was last updated on Oct 22, 2025.