National Stock Number
4920-00-490-8289
National Stock Number (NSN) 4920-00-490-8289, or NIIN 004908289, (grinding machine,valve seat,elec) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number 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, there are no suppliers 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.
This NSN is assigned to Item Name Code (INC) 21423. [A MOTOR DRIVEN GRINDING MACHINE THAT UTILIZES AN ABRASIVE WHEEL, DESIGNED FOR PRECISION GRINDING AND REFINISHING OF INTERNAL COMBUSTION ENGINE VALVE SEATS. IT CONSISTS ESSENTIALLY OF A BASE, UPRIGHT AND GRINDING SUPPORTS, WORK HOLDER, ELECTRIC MOTOR(S), SPINDLE(S), GRINDING HEAD(S), GAGE(S), AND ANY NECESSARY ACCESSORIES SUCH AS DIAMOND DRESSERS AND ABRASIVE WHEEL SETS. IT USUALLY HAS A COOLANT SYSTEM FOR WET GRINDING AND IT MAY BE PORTABLE (DISASSEMBLED IN CONTAINER BASE) FOR EASE OF TRANSPORTATION. EXCLUDES:GRINDING KIT, VALVE SEAT, ELECTRIC.]. 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 4920004908289 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.