National Stock Number
6625-01-343-3026
National Stock Number (NSN) 6625-01-343-3026, or NIIN 013433026, (frequency standard) was assigned August 9, 1991 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 6 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 3 suppliers are listed as Active suppliers 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Mar 20, 2005, 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) 42641. [AN ITEM THAT CAN GENERATE A FUNDAMENTAL FREQUENCY WITH A HIGH DEGREE OF ACCURACY. HARMONICS OF THIS FUNDAMENTAL ARE THEN USED AS A REFERENCE POINT FOR CHECKING THROUGHOUT THE RADIO SPECTRUM. THE STANDARD MAY BE STABLE CRYSTAL OSCILLATOR, NONCRYSTAL OSCILLATOR, TUNING FORK, ATOMIC BEAM, MOLECULAR BEAM, GAS CELL, QUANTUM MECHANICAL RESONATOR, OR THE LIKE.]. This item is specifically designed to be or selected as being nuclear hard (ie. it will continue to perform its designed function in an environment created by a nuclear explosion). This item does not have any other critical features. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 6625013433026 does not contain precious metals.
This NSN is associated to Schedule B 9030908030: parts and accessories of articles of schedule b subheading 9030.39. The Schedule B End Use is listed as measuring, testing, control instruments. NAICS classification category 334515: instrument manufacturing for measuring and testing electricity and electrical signals.
This information was last updated on Aug 01, 2025.