The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-149-8343, 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. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-149-8343 |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Status | ACTIVE |
| Furnished Data | LIQUID FLOW |
| Nominal Pipe Size for Which Designed | UNABLE TO DECODE |
| Data Furnishing Method | CLEAR WINDOW AND ROTOR |
| End Connection Type | UNABLE TO DECODE |
| Style Designator | DOUBLE PORT FLANGED |
| Media for Which Designed | ANY ACCEPTABLE |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| D-2657 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6680-01-149-8343 is a Indicator,sight,liquid, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6145-01-286-9846. Verify interchangeability with system specifications before substitution.
Key specifications for 6680-01-149-8343: Furnished Data: LIQUID FLOW; Nominal Pipe Size for Which Designed: UNABLE TO DECODE; Data Furnishing Method: CLEAR WINDOW AND ROTOR; End Connection Type: UNABLE TO DECODE. 7 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.