National Stock Number
6635-00-409-8851
National Stock Number (NSN) 6635-00-409-8851, or NIIN 004098851, (test set,diffuser) was assigned January 28, 1972 in the Federal Logistics Information System (FLIS). NIIN 004098851 was cancelled on December 5, 2019, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN replaces 1 stock number, 6635001633058.
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, 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Sep 02, 2020, this NSN's acquisition method was noted as: Not established. Not established.
This NSN is assigned to Item Name Code (INC) 67867. [A COLLECTION OF ITEMS SUCH AS TUBING, GLASSWARE, PUMPS, REGULATORS, FLOWMETERS AND THE LIKE DESIGNED TO CHECK PORE DIAMETER AND PERMEABILITY OF DIFFUSERS USED TO TEST OIL VELOCITY AND TATIC PRESSURE (FOAMING). EXCLUDES:TEST KIT, OIL CONDITION.]. 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 6635004098851 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.