National Stock Number
6610-01-566-4500
National Stock Number (NSN) 6610-01-566-4500, or NIIN 015664500, (mask prism lower) was assigned September 2, 2008 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) 77777. 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 6610015664500 does not contain precious metals.
This information was last updated on Aug 01, 2025.