# NSN 6680-00-522-6397: Generator, Tachometer

NSN 6680-00-522-6397 (also written 6680005226397; NIIN 00-522-6397) is a generator, tachometer in Federal Supply Class 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. 2 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 6680-00-522-6397 (6680005226397)
- NIIN: 00-522-6397 (005226397)
- Item name: GENERATOR,TACHOMETER
- Federal Supply Class: [FSC 6680 Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments](https://nsnexplorer.com/fsc/6680/)
- Federal Supply Group: [FSG 66](https://nsnexplorer.com/group/66/)
- Acquisition method suffix code: AMSC C: needs engineering source approval; other sources must qualify first. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| CWFX | ROTOR SPEED RATING IN RPM | SINGLE FULL LOAD 15000.0 |
| CWCS | LENGTH OF SHAFT FROM HOUSING | SINGLE END INCHES 0.438 |
| AXHR | MOUNTING FACILITY TYPE AND QUANTITY | CLAMP COLLAR 1 |
| TTQY | TERMINAL TYPE AND QUANTITY | CONNECTOR, PLUG 1 |
| AYHE | EXCITOR TYPE | SELF-EXCITED |
| BDJD | ACCURACY RANGE IN PERCENT | -0.05 TO 0.05 |
| BFLQ | CALIBRATION SPEED IN RPM | 1000.0 |
| AAJU | OVERALL LENGTH | INCHES 2.358 |
| AAJV | OVERALL WIDTH | INCHES 1.061 |
| AAPP | ELECTRICAL RESISTANCE | OHMS 300.0 |
| AKCT | SHAFT ROTATION DIRECTION | SINGLE END CLOCKWISE OR COUNTERCLOCKWISE |
| ANTN | SPECIFIC USE | AH-1 HELICOPTER |
| BKPC | CALIBRATION VOLTAGE OUTPUT TYPE IN VOLTS | DC 7.0 |
| CBBL | FEATURES PROVIDED | HORIZONTAL MOUNTING POSITION AND VERTICAL MOUNTING POSITION |
| AXGY | MOUNTING METHOD | CLAMP RING(S) |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 139C7804 | 05606 | GENERAL DYNAMICS-OTS, INC. DIV ORDNANCE AND TACTICAL SYSTEMS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 139C7804 | 19200 | COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=6680005226397&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=6680005226397
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/6680-00-522-6397/
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