The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-413-4173, 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. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments (FSG 66) |
| Manufacturers | Ernst Flow Industries Llc Div Ernst Flow Industries (CAGE 16199) |
| Parameter | Value |
|---|---|
| NSN | 6680-01-413-4173 |
| Primary Part Number | EFT53A-1/2 IN. NPT |
| 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 |
| 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 |
|---|---|
| EFT53A-1/2 IN. NPT PRIMARY | Ernst Flow Industries Llc Div Ernst Flow Industries (USA) |
| Reference | Meaning |
|---|---|
| EEP53A-1/2 IN. NPT | 5/9 Secondary reference Ernst Flow Industries Llc Div Ernst Flow Industries |
| 149080 FIND NO.123 | 5/9 Secondary reference M.e.p. Marine Equipment Pellegrini Srl |
NSN 6680-01-413-4173 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 6680-01-413-4173 has 1 manufacturer part number on file: EFT53A-1/2 IN. NPT (Ernst Flow Industries Llc Div Ernst Flow Industries).
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.