National Stock Number
4520-00-272-8661
National Stock Number (NSN) 4520-00-272-8661, or NIIN 002728661, (elbow,air conditioning-heating) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 5 stock numbers: 4520008101914, 4520002027315, 4520002027316, 4520008184217, 4520007272244.
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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 30, 2014, this NSN's acquisition method was noted as: Not established. Not established.
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 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 4520002728661 does not contain precious metals.
This NSN is associated to Schedule B 8415909000: parts, nesoi, of air conditioning machines. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 333415: air-conditioning and warm air heating equipment and commercial and industrial refrigeration equipment manufacturing.
This information was last updated on Aug 01, 2025.