The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-528-4374, 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 Naval Sea Systems Command. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-528-4374 |
| Primary Part Number | 801-6640825-ASSY 30 |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Data Furnishing Method | CLEAR WINDOW |
| Style Designator | DOUBLE PORT |
| Material | COPPER ALLOY AND GLASS |
| 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 |
|---|---|
| 801-6640825-ASSY 30 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2633-702-01 ASSY 30 | 5/1 Secondary reference U.S. Government activity |
| 2633-702-01 | D/9 Drawing number reference only U.S. Government activity |
| 801-6640825 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 6680-01-528-4374 is a Indicator,sight,liquid, manufactured by Naval Sea Systems Command, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-528-4374 has 1 manufacturer part number on file: 801-6640825-ASSY 30 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 5330-01-701-6049, 5365-01-701-6050, 6680-01-702-5594. Verify interchangeability with system specifications before substitution.
Key specifications for 801-6640825-ASSY 30: Overall Height: 5.360 INCHES NOMINAL IN; Data Furnishing Method: CLEAR WINDOW; Style Designator: DOUBLE PORT; Overall Length: 5.760 INCHES NOMINAL IN. 3 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.