The Meter,impeller Type,liquid, cataloged under National Stock Number 6680-01-032-7021, 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 Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-032-7021 |
| Primary Part Number | 604AS892-2 |
| Item Name | Meter,impeller Type,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc |
| Status | ACTIVE |
| Inlet Flange Shape | ROUND |
| Actuation Method | ROTARY |
| Outlet Flange Diameter | 6.000 INCHES NOMINAL IN |
| Straightening Vane | PROVIDED |
| Outlet Bolt Hole Quantity | 8 |
| Liquid Flow Rate | 6.2 GALLONS PER HOUR MINIMUM AND 300.0 GALLONS PER HOUR MAXIMUM |
| Outlet Flange Shape | ROUND |
| Inlet Flange Diameter | 6.000 INCHES NOMINAL IN |
| Outlet Connection Size | 2.000 IN. ID IN |
| Inlet Bolt Hole Quantity | 8 |
| Installation Location | ANY ACCEPTABLE |
| Material | STEEL CORROSION RESISTING BODY |
| Media for Which Designed | LIQUID |
| Inlet Connection Size | 2.000 IN. ID 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 |
|---|---|
| 604AS892-2 PRIMARY | Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc (USA) |
| 604AS892-2 | Ametek Inc Schutte and Koerting Div (USA) |
| Reference | Meaning |
|---|---|
| 604AS892 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 6680-01-032-7021 is a Meter,impeller Type,liquid, manufactured by Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-032-7021 has 2 manufacturer part numbers on file: 604AS892-2 (Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc), 604AS892-2 (Ametek Inc Schutte and Koerting Div).
1 possible match (shared part number, not a government interchangeability claim): 6680-01-056-0964. Verify interchangeability with system specifications before substitution.
Key specifications for 604AS892-2: Inlet Flange Shape: ROUND; Actuation Method: ROTARY; Outlet Flange Diameter: 6.000 INCHES NOMINAL IN; Straightening Vane: PROVIDED. 14 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.