The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-034-4078, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 27 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-034-4078 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Scale Accuracy | 0.25 PCT ENTIRE RANGE |
| Scale Name | POUNDS PRESSURE |
| Relationship to Similar Equipment | 6685-00-201-8933 AIR OR WATER ONLY |
| Overall Diameter | 4.812 INCHES MINIMUM AND 4.969 INCHES MAXIMUM IN |
| Actuation Type | BOURDON TUBE |
| Mounting Connection Location | BOTTOM |
| Mounting Method | RIGID STEM |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND, LETTERS TO BE RED COLOR |
| Scale Smallest Increment | 0.25 POUNDS PER SQUARE INCH (PSI) LBS |
| Reference Data and Literature | BOEING DWG 29-28931 |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 30.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Pointer Type | INDICATING |
| Accessory Components and Quantity | CAP 1 |
| Adjustability | ADJUSTABLE |
| Scale Type | DIAL AND SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 4-1/2 IN.DIA IN |
| Graduation Unit | 5.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | BOTTOM |
| Pointer Color | BLACK |
| Surface Treatment | PAINT EPOXY CASE |
| Unable to Decode | UNABLE TO DECODE |
| Material | ALUMINUM ALLOY CASE |
| Material | COPPER ALLOY ACTUATING ELEMENT |
| Connection Quantity | 1 |
| Connection Size | 7/16-20 UNJF-3A A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 29-28931-2 | 5/9 Secondary reference Desco Corp Marsh Bellofram Div |
| 29-28931-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6685-01-034-4078 is a Gage,pressure,dial Indicating, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
Key specifications for 6685-01-034-4078: Scale Accuracy: 0.25 PCT ENTIRE RANGE; Scale Name: POUNDS PRESSURE; Relationship to Similar Equipment: 6685-00-201-8933 AIR OR WATER ONLY; Overall Diameter: 4.812 INCHES MINIMUM AND 4.969 INCHES MAXIMUM IN. 27 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.