The Indicator,electrical Tachometer, cataloged under National Stock Number 6680-01-307-4864, 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 Staco Systems, Inc. Dba Staco Systems Div Dba Staco Systems. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments (FSG 66) |
| Manufacturers | Staco Systems, Inc. Dba Staco Systems Div Dba Staco Systems (CAGE 12522) |
| Parameter | Value |
|---|---|
| NSN | 6680-01-307-4864 |
| Primary Part Number | 2S0I-1C21B8RRXX |
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Staco Systems, Inc. Dba Staco Systems Div Dba Staco Systems |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 2S0I-1C21B8RRXX PRIMARY | Staco Systems, Inc. Dba Staco Systems Div Dba Staco Systems (USA) |
| Reference | Meaning |
|---|---|
| 2S01-1C21B8 | 5/9 Secondary reference Staco Systems, Inc. Dba Staco Systems Div Dba Staco Systems |
| PL-4981A100091-3 ITEM 94 | 5/9 Secondary reference L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
| 51955 | C/1 Advisory reference — outside the item-of-supply concept L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
| 4981A100091 ITEM 94 | D/9 Drawing number reference only L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
NSN 6680-01-307-4864 is a Indicator,electrical Tachometer, manufactured by Staco Systems, Inc. Dba Staco Systems Div Dba Staco Systems, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-307-4864 has 1 manufacturer part number on file: 2S0I-1C21B8RRXX (Staco Systems, Inc. Dba Staco Systems Div Dba Staco Systems).
2 possible matches (shared part number, not a government interchangeability claim): 2590-01-376-2674, 8345-01-617-5381. Verify interchangeability with system specifications before substitution.
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.