The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-175-5634, 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 Bae Systems Maritime Services Limited. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-175-5634 |
| Primary Part Number | 44665-091-00-3 |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Bae Systems Maritime Services Limited |
| Status | ACTIVE |
| Furnished Data | LIQUID LEVEL |
| Width Across Flats | 0.880 INCHES NOMINAL IN |
| Nominal Pipe Size for Which Designed | UNABLE TO DECODE |
| Data Furnishing Method | CLEAR WINDOW |
| End Connection Type | UNABLE TO DECODE |
| Style Designator | BULLS EYE |
| Features Provided | PRISMATIC SIGHT GLASS |
| Thread Direction | UNABLE TO DECODE |
| Nominal Thread Size | UNABLE TO DECODE |
| Media for Which Designed | OIL |
| Thread Class | UNABLE TO DECODE |
| Material | ALUMINUM ALLOY |
| Thread Series Designator | UNABLE TO DECODE |
| Sight Diameter | 0.390 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 |
| Part Number | Manufacturer |
|---|---|
| 44665-091-00-3 | Bae Systems Maritime Services Limited (GBR) |
| Reference | Meaning |
|---|---|
| 44665-091-00-3 | 5/9 Secondary reference British Aerospace Defence Systems Ltd T/a Bae Systems |
| PS83B | 3/2 Design control — primary reference U.S. Government activity |
NSN 6680-01-175-5634 is a Indicator,sight,liquid, manufactured by Bae Systems Maritime Services Limited, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-175-5634 has 1 manufacturer part number on file: 44665-091-00-3 (Bae Systems Maritime Services Limited).
Key specifications for 44665-091-00-3: Overall Height: 0.730 INCHES NOMINAL IN; Furnished Data: LIQUID LEVEL; Width Across Flats: 0.880 INCHES NOMINAL IN; Nominal Pipe Size for Which Designed: UNABLE TO DECODE. 14 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.