National Stock Number
4520-01-057-1837
National Stock Number (NSN) 4520-01-057-1837, or NIIN 010571837, (elbow,air conditioning-heating) was assigned March 8, 1978 in the Federal Logistics Information System (FLIS). NIIN 010571837 was cancelled on October 13, 2004, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers 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, there are no suppliers listed as an Active supplier for this NSN. Of the active suppliers, there are no suppliers that are 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) 15677. [A FITTING USED TO CONNECT TWO SECTIONS OF AIR CONDITIONING-HEATING FLUE PIPES OF THE SAME CROSS-SECTIONAL SHAPE TO FORM AN ANGULAR TURN.]. This item does not have a critical feature such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4520010571837 contains an unknown precious metal.
This information was last updated on May 01, 2025.