The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-020-6258, 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 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6680-01-020-6258 |
| 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 LEVEL |
| Data Furnishing Method | CLEAR WINDOW |
| End Connection Type | UNABLE TO DECODE |
| Style Designator | GAGE VALVE |
| Bolt Hole Diameter | UNABLE TO DECODE |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE |
| Features Provided | DRAIN COCK |
| Bolt Hole Quantity | UNABLE TO DECODE |
| Bolt Circle Diameter | 2.750 INCHES NOMINAL IN |
| Maximum Working Pressure | 225.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | COPPER ALLOY |
| Flange Outside Diameter | 3.875 INCHES NOMINAL IN |
| Sight Diameter | 0.750 INCHES NOMINAL IN |
| 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 |
|---|---|
| A-5 | 5/1 Secondary reference U.S. Government activity |
| 00336D-62255-040 | 3/2 Design control — primary reference U.S. Government activity |
| 00336D | 5/1 Secondary reference U.S. Government activity |
NSN 6680-01-020-6258 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 6680-01-020-6258: Furnished Data: LIQUID LEVEL; Data Furnishing Method: CLEAR WINDOW; End Connection Type: UNABLE TO DECODE; Style Designator: GAGE VALVE. 13 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.