National Stock Number (NSN) 4320-01-296-1721, or NIIN 012961721, (seal assembly,shaft,spring loade) was assigned March 16, 1989 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 3 stock numbers: 4320012411488, 4320013833318, 5330013135075.
There are 5 manufacturer part numbers associated with this NSN. 2 of those 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 a year. There have been 43 contracts issued for this part number, with 43 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 3 different suppliers. The last contract numbers awarded were: SPE7M125V0302, SPE7M124V5729, SPE7M124V1600, SPE7M124V1423, SPE7M123V6703. The total value of the awarded contracts has been US$ 670,821.98.
This NSN is fairly common among different weapons systems, belonging to 23 different platforms.
There has been a moderate amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. The 24 month forecast from the US Government for this part number has high volatility, with an estimated forecasted value of US$ 28,537. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on May 03, 2012, 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) 32556. [A COMBINATION OF ITEMS USED IN SEALING VARIOUS ROTARY SHAFT EQUIPMENT. IT MAY INCLUDE ITEMS SUCH AS BELLOWS, DISK, DRIVE RING, FLEXIBLE DIAPHRAGM, MATING RING, O-RING, RETAINER, SEAT, SLEEVE, WASHER, AND THE LIKE. EXCLUDES:SEAL,PLAIN ENCASED.]. 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 4320012961721 does not contain precious metals.
This NSN is associated to Schedule B 8413919520: parts, nesoi, of pumps for liquids. The Schedule B End Use is listed as industrial engines. NAICS classification category 333911: pump and pumping equipment manufacturing.
This information was last updated on Aug 01, 2025.