National Stock Number
4220-01-640-8513
National Stock Number (NSN) 4220-01-640-8513, or NIIN 016408513, (diffuser,air supply) was assigned December 29, 2014 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]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4220016408513 does not contain precious metals.
This information was last updated on Aug 01, 2025.