The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-775-7579, 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 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-775-7579 |
| 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 Name | PRESSURE |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| Actuation Type | ANY ACCEPTABLE |
| Mounting Connection Location | BACK |
| Mounting Method | BRACKET(S) |
| Scale Inscription/background Color | WHITE MARKINGS ON BLACK BACKGROUND |
| Scale Smallest Increment | 100.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 5000.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Mounting Hole Diameter | 0.250 INCHES NOMINAL IN |
| Pointer Type | INDICATING |
| Adjustability | NONADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 3-1/2 IN. DIA IN |
| Graduation Unit | 1000.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | BACK, CENTER |
| Pointer Color | BLACK |
| Material | GLASS PROTECTIVE CRYSTAL |
| 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 |
|---|---|
| 29669 | 3/9 Design control — primary reference Davey Compressor Co Div of Keco Industries Inc |
| 29669 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
NSN 6685-00-775-7579 is a Gage,pressure,dial Indicating, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3439-01-226-6954, 5307-01-398-7472, 4130-01-649-6306. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-00-775-7579: Mounting Hole Quantity: 3; Scale Name: PRESSURE; Overall Diameter: 4.000 INCHES NOMINAL IN; Actuation Type: ANY ACCEPTABLE. 22 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.