The Indicator,electrical Tachometer, cataloged under National Stock Number 6680-01-280-0017, 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 Dynalec Corporation. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-280-0017 |
| Primary Part Number | U4GM-4 |
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Dynalec Corporation |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Mounting Arrangement Style | FOUR HOLE/STUD RECTANGULAR/SQUARE |
| Length | 5.188 INCHES NOMINAL IN |
| Electrical Connection Quantity | 1 |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 4.625 INCHES NOMINAL IN |
| Electrical Connection Identifying Number | 211-5K-639749 |
| Scale Range | +0.1 TO 300.0 REVOLUTIONS PER MINUTE SINGLE INDICATOR SINGLE SCALE |
| Mounting Hole Diameter | 0.250 INCHES NOMINAL IN |
| Pointer Type | CLOCK-HAND SINGLE POINTER |
| Presentation Type | WINDOW |
| Scale Division Quantity | 60 SINGLE INDICATOR SINGLE SCALE |
| Height | 5.188 INCHES NOMINAL IN |
| Depth | 5.438 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 4.625 INCHES NOMINAL IN |
| Material | ALUMINUM AND COPPER ALLOY CASE |
| Pointer Purpose | REVOLUTION INCREASE OR DECREASE |
| 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 |
|---|---|
| U4GM-4 PRIMARY | Dynalec Corporation (USA) |
| Reference | Meaning |
|---|---|
| U4GM-4 | 5/9 Secondary reference The Electric Tachometer Corp. |
NSN 6680-01-280-0017 is a Indicator,electrical Tachometer, manufactured by Dynalec Corporation, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-280-0017 has 1 manufacturer part number on file: U4GM-4 (Dynalec Corporation).
Key specifications for U4GM-4: Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Mounting Arrangement Style: FOUR HOLE/STUD RECTANGULAR/SQUARE; Length: 5.188 INCHES NOMINAL IN; Electrical Connection Quantity: 1. 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.