The Tachometer,mechanical,fixed Moun, cataloged under National Stock Number 6680-01-468-4976, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Phaostron Instrument and Electronic Company. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-468-4976 |
| Primary Part Number | 623-20775 |
| Item Name | Tachometer,mechanical,fixed Moun |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Phaostron Instrument and Electronic Company |
| Status | ACTIVE |
| Overall Diameter | 2.695 INCHES NOMINAL IN |
| Dial Illumination | NOT PROVIDED |
| Drive Connection Type | THREADED |
| Shaft Rotation Direction | CLOCKWISE/COUNTERCLOCKWISE |
| Totalizing Mechanism | NOT PROVIDED |
| Scale Measurement Unit | REVOLUTIONS PER MINUTE |
| Pointer Quantity | 1 |
| Pointer Movement Direction | CLOCKWISE AND COUNTERCLOCKWISE |
| Unable to Decode | UNABLE TO DECODE |
| Graduation Unit | 20.0 REVOLUTIONS |
| Case Shape | ROUND |
| Scale Measurement Range | +0.0 TO 120.0 |
| Ahead-Astern Semaphore | NOT PROVIDED |
| Material | ALUMINUM OR STEEL CASE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PL405650-01-01 FIND NO M2 | Bae Systems Controls Inc. (USA) |
| 633862-01 | Bae Systems Controls Inc. (USA) |
| 623-20775 PRIMARY | Phaostron Instrument and Electronic Company (USA) |
NSN 6680-01-468-4976 is a Tachometer,mechanical,fixed Moun, manufactured by Phaostron Instrument and Electronic Company, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-468-4976 has 3 manufacturer part numbers on file: PL405650-01-01 FIND NO M2 (Bae Systems Controls Inc.), 633862-01 (Bae Systems Controls Inc.), 623-20775 (Phaostron Instrument and Electronic Company).
Key specifications for 623-20775: Overall Diameter: 2.695 INCHES NOMINAL IN; Dial Illumination: NOT PROVIDED; Drive Connection Type: THREADED; Shaft Rotation Direction: CLOCKWISE/COUNTERCLOCKWISE. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.