National Stock Number
4320-00-407-8478
National Stock Number (NSN) 4320-00-407-8478, or NIIN 004078478, (ring,wearing) was assigned January 18, 1972 in the Federal Logistics Information System (FLIS). NIIN 004078478 was cancelled on December 2, 1999, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4320012515283. This NSN does not replace any other NSNs.
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.
This NSN is assigned to Item Name Code (INC) 22534. [A CYLINDRICAL ITEM WITH OR WITHOUT FLANGE(S), DESIGNED TO BE INSERTED IN A PUMP CASING OR SECURED TO THE IMPELLER OF A CENTRIFUGAL PUMP. IT IS USED FOR THE PURPOSE OF PROVIDING A CLOSE RUNNING CLEARANCE BETWEEN THE IMPELLER AND CASING IN ORDER TO PREVENT OR OVERCOME LEAKAGE DUE TO EROSION. IT MAY ALSO BE USED AS A DIFFUSER RING IN THE SUCTION AND DISCHARGE THROATS OF VALVES.]. This item does not have a critical feature such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4320004078478 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.