The Glass,liquid Sight Indicator,fla, cataloged under National Stock Number 6680-01-006-7164, 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 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-006-7164 |
| Primary Part Number | C2140-3.625X.625TEMPERED |
| Item Name | Glass,liquid Sight Indicator,fla |
| 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 |
| Design Type | PLAIN |
| Overall Diameter | 3.625 INCHES NOMINAL IN |
| Overall Thickness | 0.625 INCHES NOMINAL IN |
| Gage Rated Pressure | 150.0 POUNDS PER SQUARE INCH LBS |
| Mica Shield | NOT PROVIDED |
| Gasket | NOT INCLUDED |
| 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 |
|---|---|
| C2140-3.625X.625TEMPERED PRIMARY | Ernst Flow Industries Llc Div Ernst Flow Industries (USA) |
| Reference | Meaning |
|---|---|
| C2140 | 5/9 Secondary reference Ernst Flow Industries Llc Div Ernst Flow Industries |
NSN 6680-01-006-7164 is a Glass,liquid Sight Indicator,fla, 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 6680-01-006-7164 has 1 manufacturer part number on file: C2140-3.625X.625TEMPERED (Ernst Flow Industries Llc Div Ernst Flow Industries).
1 possible match (shared part number, not a government interchangeability claim): 9340-01-560-3522. Verify interchangeability with system specifications before substitution.
Key specifications for C2140-3.625X.625TEMPERED: Design Type: PLAIN; Overall Diameter: 3.625 INCHES NOMINAL IN; Overall Thickness: 0.625 INCHES NOMINAL IN; Gage Rated Pressure: 150.0 POUNDS PER SQUARE INCH LBS. 6 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.