National Stock Number
5331-01-331-8137
National Stock Number (NSN) 5331-01-331-8137, or NIIN 013318137, (o-ring) was assigned December 28, 1990 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 5330012560823.
There are 13 manufacturer part numbers associated with this NSN. 7 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 5 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts. ISO Group has built a very strong supply chain for this NSN. We have direct relationships with 47 sources of supply.
This part number has not been procured by the US Government in over 5 years, with the most recent procurement date of Nov 26, 2018. There have been 6 contracts issued for this part number, with 9 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 2 different suppliers. The last contract numbers awarded were: SPE7M819V0694, SPE7M215D5000, SPE7M215D5000, SPE7M215D5000, SPE7M215D5000. The total value of the awarded contracts has been US$ 21,191.00.
This NSN is very common among different weapons systems, belonging to 89 different platforms.
This national stock number is in high demand. Globally, demand for this NSN has originated from 26 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 31, 2007, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) Acquisition of this part is controlled by QPL procedures. Valid AMCs: 1 and 2.
This NSN is assigned to Item Name Code (INC) 47946. [A NONMETALLIC CIRCULAR ITEM WITH AN APERATURE, HAVING A SOLID ROUND CROSS-SECTION. THEY ARE USED PRIMARILY FOR SEALING. FOR ITEMS WITH OTHER THAN ROUND CROSS SECTION, SEE PACKING,PREFORMED. FOR NONCIRCULAR ITEMS WITH A ROUND CROSS-SECTION, SEE SEAL,NONMETALLIC ROUND SECTION AND RUBBER,ROUND SECTION.]. This item does not have a nuclear hardened feature but does have other critical feature(s) 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 5331013318137 does not contain precious metals.
This information was last updated on May 01, 2025.