National Stock Number
4820-01-249-9177
National Stock Number (NSN) 4820-01-249-9177, or NIIN 012499177, (retainer,disk,valve) was assigned February 20, 1987 in the Federal Logistics Information System (FLIS). NIIN 012499177 was cancelled on April 2, 2009, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4820011084947. This NSN does not replace any other NSNs.
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.
This NSN is assigned to Item Name Code (INC) 35917. [AN ITEM OF VARIOUS SHAPES AND CROSS-SECTIONS, THAT MAY BE FLANGED AND THAT IS DESIGNED TO FIT OVER A VALVE DISK, ALLOWING PROPER POSITION OF DISK-TO-VALVE SEAT WITHIN A VALVE BODY.]. The item is a non-aviation Critical Safety Item (CSI) whose failure will result in serious damage to equipment or serious injury or death to personnel. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820012499177 does not contain precious metals.
This information was last updated on Aug 01, 2025.