The Tachometer, cataloged under National Stock Number 6680-01-018-1008, 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 Stewart-Warner Corporation. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-018-1008 |
| Primary Part Number | 551AXM |
| Item Name | Tachometer |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Stewart-Warner Corporation |
| Status | ACTIVE |
| 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 |
|---|---|
| 551AXM PRIMARY | Stewart-Warner Corporation (USA) |
| Reference | Meaning |
|---|---|
| NP-5016-003 | 5/1 Secondary reference U.S. Government activity |
| NP-5016-003 | 5/9 Secondary reference Barber-Greene Co |
| 551WB | 5/9 Secondary reference Stewart-Warner Corporation |
| NP-5016-003 | C/1 Advisory reference — outside the item-of-supply concept Minnpar, Llc Dba Minnpar |
| 82686 | 5/9 Secondary reference Stewart-Warner Corporation |
NSN 6680-01-018-1008 is a Tachometer, manufactured by Stewart-Warner Corporation, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-018-1008 has 1 manufacturer part number on file: 551AXM (Stewart-Warner Corporation).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-200-5586, 4730-01-254-3597, 5342-01-613-0975. Verify interchangeability with system specifications before substitution.
Key specifications for 551AXM: End Item Identification: CONCRETE MIXING PLANT. 0 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.