The Manometer,u-Tube, cataloged under National Stock Number 6685-01-147-3663, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-147-3663 |
| Primary Part Number | 20DA40WM/0-20 |
| Item Name | Manometer,u-Tube |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument |
| Status | ACTIVE |
| Zero Adjuster | PROVIDED |
| Indicator Type | TWO LIQUID |
| Equalizing Valve | PROVIDED |
| Scale Smallest Increment | 0.1 INCHES IN |
| Indicating Liquid | PROVIDED |
| Scale Range | +0.0 TO 20.0 INCHES IN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Accessory Components and Quantity | RETURN WELL,LINE TRAP,MICROMETERING VALVE,PIPING MANIFOLD AND VALVE |
| Tubing Outside Diameter | 0.608 INCHES NOMINAL IN |
| Connection Facility Type | INTERNAL |
| Connection Location | TOP AND BOTTOM |
| Parallax Eliminating Feature | PROVIDED |
| Control Valve | NOT PROVIDED |
| Mounting Provision for Which Designed | BASE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 20DA40WM/0-20 PRIMARY | Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument (USA) |
NSN 6685-01-147-3663 is a Manometer,u-Tube, manufactured by Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-147-3663 has 1 manufacturer part number on file: 20DA40WM/0-20 (Scott Fetzer Company, the Dba Meriam Process Technologies Div Meriam Instrument).
Key specifications for 20DA40WM/0-20: Zero Adjuster: PROVIDED; Indicator Type: TWO LIQUID; Equalizing Valve: PROVIDED; Scale Smallest Increment: 0.1 INCHES IN. 14 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.