The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-413-1497, 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 Ernst, John C & Co, Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-413-1497 |
| Primary Part Number | 420-05 FLG 33IN |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Ernst, John C & Co, Inc. |
| Status | ACTIVE |
| Furnished Data | LIQUID LEVEL |
| Data Furnishing Method | CLEAR WINDOW |
| Maximum Working Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 420-05 FLG 33IN PRIMARY | Ernst, John C & Co, Inc. (USA) |
| Reference | Meaning |
|---|---|
| E42004 | D/9 Drawing number reference only Ernst, John C & Co, Inc. |
NSN 6680-01-413-1497 is a Indicator,sight,liquid, manufactured by Ernst, John C & Co, Inc., classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-413-1497 has 1 manufacturer part number on file: 420-05 FLG 33IN (Ernst, John C & Co, Inc.).
4 possible matches (shared part number, not a government interchangeability claim): 6680-01-413-1499, 6680-01-413-1500, 6680-01-444-5032. Verify interchangeability with system specifications before substitution.
Key specifications for 420-05 FLG 33IN: Furnished Data: LIQUID LEVEL; Data Furnishing Method: CLEAR WINDOW; Special Features: NAVY USE;AUTOMATIC BALL CHECK IN UPPER VALVE;FLG;33IN CTRS IN; End Item Identification: 500 AUXILARY;USNS HENRY J. KAISER CLASS TAO. 4 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.