National Stock Number
4520-00-330-4270
National Stock Number (NSN) 4520-00-330-4270, or NIIN 003304270, (window,sight tube) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). This NSN replaces 2 stock numbers: 6640003313364, 4520003714534.
There are 2 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.
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 4520003304270 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.