National Stock Number
4520-01-255-6477
National Stock Number (NSN) 4520-01-255-6477, or NIIN 012556477, (collar,air conditioning-heating) was assigned May 23, 1987 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. 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 2 suppliers. 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) 15679. [A STRAIGHT FORMED FITTING WITH IDENTICAL INTERNAL ENDS, USED TO FORM A CONNECTION OF TWO AIR CONDITIONING-HEATING FITTINGS.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4520012556477 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.