National Stock Number
4520-00-203-9177
National Stock Number (NSN) 4520-00-203-9177, or NIIN 002039177, (pipe,air conditioning-heating) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). NIIN 002039177 was cancelled on December 15, 2017, 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) 15681. [A SHAPED PRODUCT OF SHEET METAL; ROUND, RECTANGULAR, OR SQUARE IN CROSS-SECTIONAL SHAPE. IT IS UNIFORM THROUGHOUT ITS LENGTH. USED TO CONDUCT AIR OR GAS FUMES FROM ONE AREA TO ANOTHER.]. 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 4520002039177 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.