The Gage,differential,dial Indicatin, cataloged under National Stock Number 6685-00-653-8516, 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27 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-653-8516 |
| Item Name | Gage,differential,dial Indicatin |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Mounting Hole Quantity | 4 |
| Scale Accuracy | 0.5 PCT ENTIRE RANGE |
| Scale Name | POUNDS PRESSURE |
| Actuation Type | DOUBLE BELLOWS |
| Mounting Method | FLUSH PANEL OR BRACKET(S) AND STUD(S) |
| Scale Inscription/background Color | WHITE FIGURES ON BLACK BACKGROUND |
| Scale Smallest Increment | 0.5 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | INTERNAL |
| Scale Range | +0.0 TO 50.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Mounting Hole Diameter | 0.169 INCHES NOMINAL IN |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | SINGLE AND DIAL |
| Connector Type Vent | PROVIDED |
| Dial Size | 3 IN.DIA IN |
| Graduation Unit | 5.0 POUNDS PER SQUARE INCH LBS |
| Bolt Circle Diameter | 3.500 INCHES NOMINAL IN |
| Connection Location | UPPER AND LOWER |
| Pointer Color | WHITE |
| Surface Treatment | ENAMEL CASE |
| Unable to Decode | UNABLE TO DECODE |
| Material | GLASS PROTECTIVE CRYSTAL |
| Material | COPPER ALLOY ACTUATING ELEMENT |
| Material | ALUMINUM CASE |
| Connection Quantity | 4 |
| Connection Size | 0.500 IN.NPT DIA; 0.250 IN.NPT DIA IN |
| Reference Number Differentiating Characteristics | SINGLE READING SCALE,CONNECTION DATA AND SPECIAL FEATURES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 226 | 3/1 Design control — primary reference Cameron Energy Services Corp. |
| 149001 | 5/2 Secondary reference U.S. Government activity |
| 163 | 5/1 Secondary reference Cameron Energy Services Corp. |
NSN 6685-00-653-8516 is a Gage,differential,dial Indicatin, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 3120-00-868-1794, 4820-00-909-8726, 7045-01-555-8201. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-00-653-8516: Mounting Hole Quantity: 4; Overall Height: 3.250 INCHES NOMINAL IN; Scale Accuracy: 0.5 PCT ENTIRE RANGE; Scale Name: POUNDS PRESSURE. 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.
NSN 6685-00-653-8516 has DEMIL Code B. 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.