The Meter,flow Rate Indicating, cataloged under National Stock Number 6680-01-088-3780, 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. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-088-3780 |
| Item Name | Meter,flow Rate Indicating |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Status | ACTIVE |
| Scale Quantity | 1 |
| Inlet Connection Position for Which Designed | VERTICAL |
| Spinning Float | NOT INCLUDED |
| Design Type | GLASS |
| Integral Pulsation Dampener | NOT INCLUDED |
| Mounting Method | DIRECT LINE |
| Inlet Connection Size | 0.500 IN. NPT IN |
| Inlet Connection Type | THREADED |
| Float Quantity | 1 |
| Alarm Signal | INCLUDED |
| Scale Type | DIRECT CAPACITY READING |
| Outlet Connection Size | 0.500 IN. NPT IN |
| Unit Type | MOUNTED |
| Outlet Connection Position for Which Designed | VERTICAL |
| Meter Type | FLOAT |
| Float Type | FREE |
| Integral Relief Valve | NOT INCLUDED |
| Unable to Decode | UNABLE TO DECODE |
| Maximum Working Pressure | 175.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | COPPER ALLOY FLOAT |
| Material | GLASS TUBE |
| Media for Which Designed | AIR |
| Integral Heat Source | NOT INCLUDED |
| Dial Scale Reference Pointer | NOT INCLUDED |
| Outlet Connection Type | THREADED |
| Metering Tube Quantity | 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 821A0033U57 | 5/9 Secondary reference Fischer and Porter Co |
| 10A2235A | 5/9 Secondary reference Fischer and Porter Co |
| 4683565-0F19 | 3/2 Design control — primary reference U.S. Government activity |
| A223574 | 3/9 Design control — primary reference Fischer and Porter Co |
NSN 6680-01-088-3780 is a Meter,flow Rate Indicating, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6680-01-115-1700, 6680-01-179-0231. Verify interchangeability with system specifications before substitution.
Key specifications for 6680-01-088-3780: Scale Quantity: 1; Inlet Connection Position for Which Designed: VERTICAL; Spinning Float: NOT INCLUDED; Design Type: GLASS. 26 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.