The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-959-4089, 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 Ashcroft Inc Dba Heise. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-959-4089 |
| Primary Part Number | 25-1009KB |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Mounting Hole Quantity | 4 |
| Scale Accuracy | 1 PCT ENTIRE RANGE |
| Scale Name | PRESSURE |
| Overall Diameter | 2.812 INCHES NOMINAL IN |
| Actuation Type | SINGLE BOURDON TUBE |
| Mounting Method | FLUSH PANEL |
| Scale Inscription/background Color | WHITE FIGURES ON BLACK BACKGROUND |
| Scale Smallest Increment | 1.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.000 TO 100.000 POUNDS PRESSURE PER SQUARE INCH LBS |
| Mounting Hole Diameter | 0.187 INCHES NOMINAL IN |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2-1/2 IN. DIA IN |
| Graduation Unit | 10.0 POUNDS PER SQUARE INCH LBS |
| Bolt Circle Diameter | 3.125 INCHES NOMINAL IN |
| Connection Location | BACK |
| Color | BLACK CASE |
| Pointer Color | WHITE |
| Surface Treatment | PAINT EPOXY CASE |
| Material | BRASS CASE |
| Material | GLASS PROTECTIVE CRYSTAL |
| Material | BRONZE ACTUATING ELEMENT |
| Connection Quantity | 1 |
| Bezel Type | THREAD |
| Connection Size | 0.250 IN. NPT DIA IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY SCALE RANGE,CONNECTION LOCATION,AND MOUNTING METHOD |
| 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 |
|---|---|
| 25-1009KB | Ashcroft Inc Dba Heise (USA) |
| 25-1009KB02B | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| 1009B | 3/1 Design control — primary reference Ashcroft Inc Dba Heise |
| 1009KB | 5/1 Secondary reference Ashcroft Inc Dba Heise |
NSN 6685-00-959-4089 is a Gage,pressure,dial Indicating, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-959-4089 has 2 manufacturer part numbers on file: 25-1009KB (Ashcroft Inc Dba Heise), 25-1009KB02B (Ashcroft Inc Dba Heise).
2 possible matches (shared part number, not a government interchangeability claim): 6070-01-159-1363, 5315-01-730-6344. Verify interchangeability with system specifications before substitution.
Key specifications for 25-1009KB: Mounting Hole Quantity: 4; Scale Accuracy: 1 PCT ENTIRE RANGE; Scale Name: PRESSURE; Overall Diameter: 2.812 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.