National Stock Number (NSN) 3110-00-731-7977, or NIIN 007317977, (bearing,ball,stack) 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 are 5 manufacturer part numbers associated with this NSN. 4 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.
This part number has not been procured by the US Government in over 5 years, with the most recent procurement date of Oct 07, 2020. There have been 13 contracts issued for this part number, with 140 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE4A221F0208, SPE4A220F3817, SPE4A220F3044, SPE4A220F2838, SPE4A220F2620. The total value of the awarded contracts has been US$ 434,119.05.
This NSN is somewhat common among different platforms, belonging to 6 different weapons systems.
There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jul 02, 2006, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 30214. [A MULTIPLE ASSEMBLY OF MORE THAN TWO BEARINGS MATCHED FOR DUPLEX MOUNTING. DESIGNED PRIMARILY FOR AIRCRAFT PROPELLER AND ROTARY WING AIRCRAFT ROTOR BLADE APPLICATIONS. SEE ALSO BEARING, BALL, ANNULAR.]. This item is a Flight Safety Critical Aircraft Part (FSCAP). There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 3110007317977 contains an unknown precious metal.
This NSN is associated to Schedule B 8482105068: ball bearings, nesoi. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332991: ball and roller bearing manufacturing.
This information was last updated on Aug 01, 2025.