National Stock Number
4220-01-349-6399
National Stock Number (NSN) 4220-01-349-6399, or NIIN 013496399, (diffuser,air supply) was assigned December 2, 1991 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. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier 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.
This NSN is assigned to Item Name Code (INC) 39163. [A CORROSION RESISTANT METALLIC/NONMETALLIC ITEM FABRICATED FROM A SINGLE INTERNALLY CORED CASTING. IT IS SPECIFICALLY DESIGNED TO REDUCE BREATHING GAS VELOCITY WHILE INCREASING STATIC PRESSURE TO EFFECTIVELY DEFOG THE VIEWPOINT OF A HELMET, DEEP-SEA DIVER'S AND HELMET, DEEP-SEA DIVER'S HELIUM-OXYGEN]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4220013496399 does not contain precious metals.
This information was last updated on Aug 01, 2025.