National Stock Number (NSN) 4820-01-221-2121, or NIIN 012212121, (stem,fluid valve) was assigned November 26, 1985 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. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. 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 somewhat common among different platforms, belonging to 2 different weapons systems.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 02, 2005, 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) 32528. [AN ITEM USUALLY METALLIC, THREADED OR UNTHREADED, USED FOR SECURING TO OR POSITIONING INTO A MATING PART. IT IS DESIGNED TO BE USED IN A GLOBE, RELIEF, REGULATOR VALVE AND THE LIKE AS A MEANS OF CONTROLLING THE FLOW OF LIQUIDS OR GASES IN A GIVEN SYSTEM. ONE END MAY HAVE AN INTEGRAL DISK OR BE DESIGNED TO ACCOMMODATE A METALLIC OR NONMETALLIC DISK. THE OTHER END IS DESIGNED FOR A HANDWHEEL, LEVER, SPRING, DIAPHRAGM AND THE LIKE FOR NONPOWERED OPERATION OR TO ACCOMMODATE A GEAR, SOLENOID, AIR MOTOR AND THE LIKE FOR POWERED OPERATION. THE HANDWHEEL AND/OR DISK MAY BE FURNISHED WITH THE ITEM. EXCLUDES STEM, FAUCET; AND STEM, NEEDLE VALVE.]. 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 4820012212121 does not contain precious metals.
This NSN is associated to Schedule B 8481909090: parts of taps, cocks, valves and similar appliances, nesoi. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.
This information was last updated on Jul 01, 2025.