The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-210-9977, 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 Flow Industries Llc Div Ernst Flow Industries. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-210-9977 |
| Primary Part Number | EFI 54-A TYPE 1 |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Ernst Flow Industries Llc Div Ernst Flow Industries |
| Status | ACTIVE |
| Furnished Data | LIQUID LEVEL |
| Nominal Pipe Size for Which Designed | UNABLE TO DECODE |
| Data Furnishing Method | CLEAR WINDOW |
| End Connection Type | UNABLE TO DECODE |
| Style Designator | GAGE VALVE |
| Features Provided | DRAIN COCK |
| Distance Between Mounting Facility Centers | 28.000 INCHES NOMINAL IN |
| Media for Which Designed | ANY ACCEPTABLE |
| Maximum Working Pressure | 100.0 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 |
|---|---|
| EFI 54-A TYPE 1 PRIMARY | Ernst Flow Industries Llc Div Ernst Flow Industries (USA) |
| Reference | Meaning |
|---|---|
| EEP54A-TY1 | 5/9 Secondary reference Ernst Flow Industries Llc Div Ernst Flow Industries |
NSN 6680-01-210-9977 is a Indicator,sight,liquid, manufactured by Ernst Flow Industries Llc Div Ernst Flow Industries, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-210-9977 has 1 manufacturer part number on file: EFI 54-A TYPE 1 (Ernst Flow Industries Llc Div Ernst Flow Industries).
Key specifications for EFI 54-A TYPE 1: Furnished Data: LIQUID LEVEL; Nominal Pipe Size for Which Designed: UNABLE TO DECODE; Data Furnishing Method: CLEAR WINDOW; End Connection Type: UNABLE TO DECODE. 10 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.