National Stock Number
9135-01-665-9551
National Stock Number (NSN) 9135-01-665-9551, or NIIN 016659551, (propellant pressurizing agent,he) was assigned August 18, 2017 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are no manufacturer part numbers associated to this NSN.
This part number has not been procured by the US Government in over 5 years.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Aug 19, 2017, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.
This NSN is assigned to Item Name Code (INC) 27364. [A CHEMICAL MANUFACTURED SPECIFICALLY FOR PRESSURIZATION OF ROCKET ENGINE PROPELLANT SYSTEMS AND HAVING A MINIMUM ASSAY BY VOLUME OF NOT LESS THAN 99.995 PERCENT HELIUM. THE IMPURITIES SHALL BE LIMITED AS NECESSITATED BY ITS SPECIAL USE. EXCLUDES:HELIUM (AS MODIFIED).]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. Information is in the Hazardous Materials Information Resource System (HMIRS). NSN 9135016659551 does not contain precious metals.
This NSN is associated to Schedule B 2804290010: helium. The Schedule B End Use is listed as chemicals-inorganic. NAICS classification category 325120: industrial gas manufacturing.
This information was last updated on Aug 01, 2025.