The Indicator,electrical Tachometer, cataloged under National Stock Number 6680-01-503-9443, 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. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-503-9443 |
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 PANEL AND 4 THREADED STUD(S) |
| Mounting Arrangement Style | FOUR HOLE/STUD RECTANGULAR/SQUARE |
| Current Type | AC |
| Electrical Connection Quantity | 2 |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.688 INCHES NOMINAL IN |
| Mounting Stud Diameter | 0.250 INCHES NOMINAL IN |
| Scale Range | +0.1 TO 4000.0 REVOLUTIONS PER MINUTE SINGLE INDICATOR ALL SCALES |
| Mounting Hole Diameter | 4.000 INCHES NOMINAL IN |
| Pointer Type | INDICATING SINGLE POINTER |
| Presentation Type | DIAL |
| Specification/standard Data | 81349-MIL-M-16034/3A GOVERNMENT SPECIFICATION A |
| Height | 4.250 INCHES MINIMUM AND 4.750 INCHES MAXIMUM IN |
| Mounting Stud Length | 0.500 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Depth | 9.000 INCHES MINIMUM AND 10.000 INCHES MAXIMUM IN |
| Width | 4.250 INCHES MINIMUM AND 4.750 INCHES MAXIMUM IN |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.688 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MR49W040ATVVH | 2/2 Government specification standardization U.S. Government activity |
| 564-7067509 | D/9 Drawing number reference only Naval Sea Systems Command |
| MIL-H-16034 | 4/1 Identification reference U.S. Government activity |
| 564-6409010-49 | 5/1 Secondary reference Naval Sea Systems Command |
| 564-6409010 | D/9 Drawing number reference only Naval Sea Systems Command |
| H6516201-28 | 5/1 Secondary reference U.S. Government activity |
| 564-7067509-28 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 6680-01-503-9443 is a Indicator,electrical Tachometer, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
Key specifications for 6680-01-503-9443: Mounting Facility Type and Quantity: 1 PANEL AND 4 THREADED STUD(S); Mounting Arrangement Style: FOUR HOLE/STUD RECTANGULAR/SQUARE; Current Type: AC; Electrical Connection Quantity: 2. 16 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.