6680-01-590-0397 (G2S07NQ9GMA)
6680-01-590-0397 is equivalent to manufacture part number 21091F-2. It is a flow rate indicating meter and is classified under Federal Supply Class 6680 (6680 - Flow and Level Measuring Instruments), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 6680 - Flow and Level Measuring Instruments and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.