National Stock Number
4520-01-223-8739
National Stock Number (NSN) 4520-01-223-8739, or NIIN 012238739, (draft control,flue,automatic) was assigned January 9, 1986 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 3 manufacturer part numbers associated with this NSN. One of those 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.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 10, 2007, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The Government physically does not have in its possession sufficient, accurate, or legible data to purchase this part from other than current source(s). (NOTE: This code is applicable only to parts under immediate buy requirements and only as long as the deficiency is under review for resolution and appropriate recoding.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 15647. [AN ITEM CONSISTING OF A METAL FRAME IN WHICH IS INSERTED A FLAT METAL PLATE MOUNTED ON A SHAFT. THE PLATE, FLUCTUATING AUTOMATICALLY ACCORDING TO CHANGES IN ATMOSPHERIC PRESSURE, CONTROLS THE STACK OR FLUE DRAFT AND MAINTAINS AN ABSOLUTE CONSTANCY OF DRAFT REGARDLESS OF VARYING WEATHER CONDITIONS.]. 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 4520012238739 does not contain precious metals.
This information was last updated on Jul 01, 2025.