The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-684-1689, 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 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 29 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-684-1689 |
| Primary Part Number | 3W51609 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| FSC Application Data | GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE |
| Scale Accuracy | 2 PCT MIDDLE HALF OF RANGE,3 PCT OVER BALANCE |
| Scale Name | PRESSURE |
| Overall Diameter | 2.781 INCHES NOMINAL IN |
| Actuation Type | SINGLE BOURDON TUBE |
| Mounting Method | FLUSH PANEL AND STUD(S) AND BRACKET(S) |
| Scale Inscription/background Color | BLACK FIGURES ON WHITE BACKGROUND,RED SHADED AND MARKED /DANGER/ BETWEEN 3200 AND 5000 LBS LBS |
| Scale Smallest Increment | 50.0 POUNDS LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.000 TO 5000.000 POUNDS PRESSURE PER SQUARE INCH LBS |
| Stud Location | BACK |
| Stud Quantity | 2 |
| Pointer Type | INDICATING |
| Adjustability | NONADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2-1/2 IN. DIA IN |
| Graduation Unit | 1000.0 POUNDS LBS |
| Connection Location | BACK |
| Color | BLACK CASE |
| Pointer Color | BLACK |
| Surface Treatment | PAINT EPOXY CASE |
| Unable to Decode | UNABLE TO DECODE |
| Material | STEEL CASE |
| Material | BRONZE ACTUATING ELEMENT |
| Material | PLASTIC PROTECTIVE CRYSTAL |
| Connection Quantity | 1 |
| Bezel Type | SNAP-ON |
| Connection Size | 1/8 IN. NPT IN |
| 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 |
|---|---|
| 3W51609 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 3W51609 | 5/9 Secondary reference U.S. Government activity |
| 3W51609 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 3W51609 | 5/9 Secondary reference Ingersoll Rand Co |
NSN 6685-00-684-1689 is a Gage,pressure,dial Indicating, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-684-1689 has 1 manufacturer part number on file: 3W51609 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for 3W51609: FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE; Scale Accuracy: 2 PCT MIDDLE HALF OF RANGE,3 PCT OVER BALANCE; Scale Name: PRESSURE; Overall Diameter: 2.781 INCHES NOMINAL IN. 29 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.