The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-252-3039, 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27 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-252-3039 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Mounting Hole Quantity | 3 |
| Scale Accuracy | 1/2 OF 1 PCT RATING MIDDLE THIRD OF RANGE |
| Scale Name | PRESSURE |
| Overall Diameter | 5.812 INCHES NOMINAL IN |
| Actuation Type | SINGLE BOURDON TUBE |
| Mounting Method | SURFACE WALL |
| Scale Inscription/background Color | BLACK FIGURES ON WHITE BACKGROUND |
| Scale Smallest Increment | 50.0 POUNDS LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.000 TO 5000.000 POUNDS PRESSURE PER SQUARE INCH LBS |
| Mounting Hole Diameter | 0.219 INCHES NOMINAL IN |
| Pointer Type | INDICATING AND REFERENCE |
| Adjustability | ADJUSTABLE OR NONADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Nondefinitive Spec/std Data | 1 TYPE AND 5 COMPOSITION |
| Dial Size | 4-1/2 IN. DIA IN |
| Graduation Unit | 500.0 POUNDS LBS |
| Bolt Circle Diameter | 5.375 INCHES NOMINAL IN |
| Connection Location | BOTTOM |
| Pointer Color | BLACK AND RED |
| Material | PLASTIC CASE |
| Material | COPPER ALLOY ACTUATING ELEMENT |
| Material | PLASTIC PROTECTIVE CRYSTAL |
| Usage Design | W/AIR,OIL,STEAM AND WATER |
| Connection Quantity | 1 |
| Connection Size | 0.500 IN. NPT DIA IN |
| 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 |
|---|---|
| 45G574-90 | 5/9 Secondary reference U.S. Government activity |
| MILG18997B | 4/1 Identification reference U.S. Government activity |
NSN 6685-00-252-3039 is a Gage,pressure,dial Indicating, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6685-00-257-4088. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-00-252-3039: Mounting Hole Quantity: 3; Scale Accuracy: 1/2 OF 1 PCT RATING MIDDLE THIRD OF RANGE; Scale Name: PRESSURE; Overall Diameter: 5.812 INCHES NOMINAL 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.