The Indicator,electrical Tachometer, cataloged under National Stock Number 6680-00-679-9299, 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 Custom Metering Company Inc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-00-679-9299 |
| Primary Part Number | 1539-179655 |
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Custom Metering Company Inc |
| Status | ACTIVE |
| Contact Type | PIN |
| Current Type | AC |
| Electrical Connection Quantity | 2 |
| Mounting Stud Diameter | 0.150 INCHES NOMINAL IN |
| Scale Range | -0.1 TO 4500.0 REVOLUTIONS PER MINUTE SINGLE INDICATOR SINGLE SCALE |
| Contact Quantity | 2 |
| Pointer Type | CLOCK-HAND SINGLE POINTER |
| Presentation Type | SYNCHRO MOTOR |
| Mounting Flange Width | 3.455 INCHES MINIMUM AND 3.460 INCHES MAXIMUM IN |
| Depth | 3.050 INCHES NOMINAL IN |
| Pointer Finish | LUMINOUS SINGLE POINTER |
| 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 |
|---|---|
| 8763345 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 1539-179655 PRIMARY | Custom Metering Company Inc (USA) |
| Reference | Meaning |
|---|---|
| 1539-179655 | 5/9 Secondary reference Metermaster Inc Miscorp Div |
| 179655 | 5/9 Secondary reference Solartron Electronics Inc Weston Instruments Div |
| 1539-179655 | 5/9 Secondary reference Solartron Electronics Inc Weston Instruments Div |
NSN 6680-00-679-9299 is a Indicator,electrical Tachometer, manufactured by Custom Metering Company Inc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-00-679-9299 has 2 manufacturer part numbers on file: 8763345 (U S Army Tank Automotive Command Amsta-Im-Mm), 1539-179655 (Custom Metering Company Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5950-00-931-1214, 6750-01-427-1913. Verify interchangeability with system specifications before substitution.
Key specifications for 1539-179655: Contact Type: PIN; Current Type: AC; Electrical Connection Quantity: 2; Mounting Stud Diameter: 0.150 INCHES NOMINAL IN. 11 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.