National Stock Number
5520-00-307-3661
National Stock Number (NSN) 5520-00-307-3661, or NIIN 003073661, (frame,observation window) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). NIIN 003073661 was cancelled on November 22, 2001, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There are no manufacturer part numbers associated to 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) 60504. [A FLAT RIGID ITEM PROVIDED WITH HOLES OR SIMILAR MEANS FOR ATTACHING TO A CONTAINER FOR THE PURPOSE OF HOLDING AN OBSERVATION WINDOW IN PLACE.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5520003073661 does not contain precious metals.
This information was last updated on Jul 01, 2025.