The Venturi Meter, cataloged under National Stock Number 6680-01-321-2701, 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 Naval Sea Systems Command. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Venturi Meter |
| FSC / FSG | 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments (FSG 66) |
| Manufacturers | Wyatt Engineering, Llc (CAGE 3J5J7); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 6680-01-321-2701 |
| Primary Part Number | 6321656 |
| Item Name | Venturi Meter |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Pressure Gage Connection | PROVIDED |
| Tube End Size | 4.58 IN ID IN |
| Liquid Flow Rate | 0.0 GALLONS PER MINUTE MINIMUM AND 500.0 GALLONS PER MINUTE MAXIMUM |
| Throat Diameter | 4.550 INCHES MINIMUM AND 4.610 INCHES MAXIMUM IN |
| Pressure Gage | NOT INCLUDED |
| End Type | PLAIN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 6680-01-321-2701 is a Venturi Meter, manufactured by Naval Sea Systems Command, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-321-2701 has 2 manufacturer part numbers on file: PMT-1F-5M (Wyatt Engineering, Llc), 6321656 (Naval Sea Systems Command).
Key specifications for 6321656: Pressure Gage Connection: PROVIDED; Tube End Size: 4.58 IN ID IN; Liquid Flow Rate: 0.0 GALLONS PER MINUTE MINIMUM AND 500.0 GALLONS PER MINUTE MAXIMUM; Throat Diameter: 4.550 INCHES MINIMUM AND 4.610 INCHES MAXIMUM IN. 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.
NSN 6680-01-321-2701 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.