National Stock Number
4820-00-050-6504
National Stock Number (NSN) 4820-00-050-6504, or NIIN 000506504, (valve,liquid oxygen drain) was assigned May 16, 1967 in the Federal Logistics Information System (FLIS). NIIN 000506504 was cancelled on May 2, 2007, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There are 4 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, there are no suppliers that are 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) 37931. [A VALVE DESIGNED TO DRAIN LIQUID OXYGEN FROM OXYGEN CONVERTERS. IT SHALL BE A POSITIVE-POSITION, TOGGLE-ACTUATING, BELLOWS-SEALED VALVE. IT IS SPECIFICALLY DESIGNED FOR OXYGEN SYSTEMS.]. This item does not have a nuclear hardened feature but does have other critical feature(s) 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 4820000506504 does not contain precious metals.
This information was last updated on Aug 01, 2025.