The Tachometer,mechanical,fixed Moun, cataloged under National Stock Number 6680-01-539-2144, 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 Tld Ace Corp Div Tld Ace. Government technical data includes 4 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-539-2144 |
| Primary Part Number | 1000436 |
| Item Name | Tachometer,mechanical,fixed Moun |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Tld Ace Corp Div Tld Ace |
| Status | ACTIVE |
| Scale Measurement Unit | REVOLUTIONS PER MINUTE |
| Graduation Unit | 100.0 REVOLUTIONS |
| Scale Measurement Range | +0.0 TO 2500.0 |
| Operating Range | +0.0 TO 40000.0 REVOLUTIONS PER MINUTE |
| 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 |
|---|---|
| 1000436 PRIMARY | Tld Ace Corp Div Tld Ace (USA) |
NSN 6680-01-539-2144 is a Tachometer,mechanical,fixed Moun, manufactured by Tld Ace Corp Div Tld Ace, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-539-2144 has 1 manufacturer part number on file: 1000436 (Tld Ace Corp Div Tld Ace).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-541-0520. Verify interchangeability with system specifications before substitution.
Key specifications for 1000436: Scale Measurement Unit: REVOLUTIONS PER MINUTE; Graduation Unit: 100.0 REVOLUTIONS; Special Features: 100 RPM MAX INCREMENT; SUPPLIED W/MTG CLAMP/HARDWARE; MTD ON INSTRUMENT PANEL; PORM 50RPM ACCURACY RPM; Scale Measurement Range: +0.0 TO 2500.0. 4 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.