National Stock Number
6620-00-954-4971
National Stock Number (NSN) 6620-00-954-4971, or NIIN 009544971, (indicator,ratio,engine pressure) was assigned January 1, 1962 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 Sep 22, 2002, this NSN's acquisition method was noted as: Suitable for competitive acquisition for the first time. (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) 32992. [AN INSTRUMENT DESIGNED TO REFLECT ONE OF THE TESTING PARAMETERS FOR CONDUCTING ENGINE PERFORMANCE AND FUNCTIONAL TESTING IN AN OPERATING ENGINE SYSTEM. ITS DIAL IS GRADUATED IN UNITS OF PRESSURE RATIO, AND IS USED TO INDICATE THE PERCENT OF DIFFERENTIAL PRESSURE RATIO OF EXHAUST GAS PRESSURE TO INTAKE (ENGINE INLET) PRESSURE FOR GAS TURBINE OR JET PROPULSION ENGINES.]. 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 6620009544971 does not contain precious metals.
This NSN is associated to Schedule B 9031808080: other measuring or checking instruments, appliances and machines, nesoi in chapter 90. 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.