National Stock Number
4820-01-556-4623
National Stock Number (NSN) 4820-01-556-4623, or NIIN 015564623, (valve,bleeder,hydraulic system) was assigned October 3, 2007 in the Federal Logistics Information System (FLIS). NIIN 015564623 was cancelled on July 2, 2009, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 4820014957911. This NSN replaces 1 stock number, 4820015564687.
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, 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, with the most recent procurement date of Feb 23, 2009. There has been one contract issued for this part number, with one award given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPM7L109M5893. The total value of the awarded contracts has been US$ 2,775.20.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries.
This NSN is assigned to Item Name Code (INC) 37648. [A METALLIC, THREADED, SCREW-SHAPED ITEM USED IN HYDRAULIC BRAKE CYLINDERS, HYDRAULIC POWER UNITS, MISSILE LAUNCHING HYDRAULIC SYSTEMS, AND THE LIKE, FOR THE PURPOSE OF PROVIDING A MEANS OF RELEASING AIR FORM AND/OR FLUSHING A HYDRAULIC SYSTEM. IT MAY BE FURNISHED WITH OR WITHOUT A DUST CAP. EXCLUDES:SPRING LOADED OR AUTOMATIC TYPE AIR PRESSURE RELIEF VALVES, AND BOLT, FLUID PASSAGE.]. 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 4820015564623 does not contain precious metals.
This information was last updated on Jul 01, 2025.