The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-664-3402, 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 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-664-3402 |
| 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 |
| Data Furnishing Method | CLEAR WINDOW |
| Style Designator | DOUBLE PORT |
| Thread Direction | UNABLE TO DECODE |
| Media for Which Designed | ETHYLENE GLYCOL/WATER MIXTURE |
| Maximum Working Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Thread Quantity Per Inch | UNABLE TO DECODE |
| Material | STEEL CORROSION RESISTING |
| Thread Series Designator | UNABLE TO DECODE |
| 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 |
|---|---|
| 318534 | 7/2 Vendor item drawing reference U.S. Government activity |
| 318534-1 | 3/2 Design control — primary reference U.S. Government activity |
| LI48A-1 | 5/9 Secondary reference Henry Technologies, Inc. |
NSN 6680-01-664-3402 is a Indicator,sight,liquid, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
Key specifications for 6680-01-664-3402: Overall Height: 3.71 INCHES NOMINAL IN; Furnished Data: LIQUID FLOW; Data Furnishing Method: CLEAR WINDOW; Style Designator: DOUBLE PORT. 9 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.