National Stock Number
6540-01-631-2780
National Stock Number (NSN) 6540-01-631-2780, or NIIN 016312780, (insert,optical,chemical-biologic) was assigned September 8, 2014 in the Federal Logistics Information System (FLIS). 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) 22347. [AN ITEM SPECIFICALLY DESIGNED TO FIT INTO A MASK, CHEMICAL-BIOLOGICAL. WITH CORRECT LENS INSERTED, IT CAN PROVIDE SPECTACLES FOR PERSONNEL REQUIRING VISUAL CORRECTIONS.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 6540016312780 does not contain precious metals.
This information was last updated on Jul 01, 2025.