The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-027-0720, 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 16 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-027-0720 |
| Primary Part Number | EFI530 SIZE 3 |
| 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 |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Nominal Pipe Size for Which Designed | UNABLE TO DECODE |
| Surface Treatment Document and Classification | 56369 FSCM 82340 MFR REF ALL TREATMENT RESPONSES |
| Data Furnishing Method | CLEAR WINDOW |
| End Connection Type | UNABLE TO DECODE |
| Style Designator | VERTICAL SHIELDED, SINGLE PORT |
| Material Document and Classification | 56369 FSCM 82340 MFR REF ALL MATERIAL RESPONSES |
| Thread Direction | UNABLE TO DECODE |
| Nominal Thread Size | UNABLE TO DECODE |
| Surface Treatment | CHROMIUM |
| Media for Which Designed | OIL |
| Thread Quantity Per Inch | UNABLE TO DECODE |
| Material | COPPER ALLOY |
| Thread Series Designator | UNABLE TO DECODE |
| Sight Height | 2.250 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 |
|---|---|
| EFI530 SIZE 3 PRIMARY | Ernst Flow Industries Llc Div Ernst Flow Industries (USA) |
| Reference | Meaning |
|---|---|
| EEP530 | C/1 Advisory reference — outside the item-of-supply concept Ernst Flow Industries Llc Div Ernst Flow Industries |
| 56369-1 | 5/9 Secondary reference L3harris Technologies, Inc. Dba Harris Div Mine Defense Systems |
| EEP530 SIZE 3 | 5/9 Secondary reference Ernst Flow Industries Llc Div Ernst Flow Industries |
| 56369-1 | 5/9 Secondary reference U.S. Government activity |
NSN 6680-01-027-0720 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 6680-01-027-0720 has 1 manufacturer part number on file: EFI530 SIZE 3 (Ernst Flow Industries Llc Div Ernst Flow Industries).
Key specifications for EFI530 SIZE 3: Overall Height: 3.750 INCHES NOMINAL IN; Furnished Data: LIQUID LEVEL; Width Across Flats: 0.750 INCHES NOMINAL IN; Nominal Pipe Size for Which Designed: UNABLE TO DECODE. 16 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.