The Gage,compound Pressure-Vacuum,di, cataloged under National Stock Number 6685-01-075-6715, 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 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-075-6715 |
| Primary Part Number | 25-1000H-01B-30HG0/30PSI |
| Item Name | Gage,compound Pressure-Vacuum,di |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Scale Accuracy | 2 PCT MIDDLE 3RD OF RANGE 3 PCT REMAINDER |
| Scale Name | PRESSURE-VACUUM |
| Overall Diameter | 2.719 INCHES NOMINAL IN |
| Actuation Type | BOURDON TUBE |
| Mounting Connection Location | BACK |
| Mounting Method | RIGID STEM |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND |
| Scale Smallest Increment | 1.0 INCHES AND 1.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 30.0 INCHES OF MERCURY AND +0.0 TO 30.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Scale Name for Which Pointer Is Designed | PRESSURE-VACUUM |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | DIAL |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2-1/2 IN. DIA IN |
| Graduation Unit | 10.0 INCHES AND 5.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | BACK |
| Pointer Color | BLACK |
| Surface Treatment | PAINT CASE |
| Connection Quantity | 1 |
| Connection Size | 0.125 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 |
| Part Number | Manufacturer |
|---|---|
| 25-1000H-01B-30HG0/30PSI PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| 54-10-65 | 5/9 Secondary reference Brooks Automation, Inc. Div Cti Cryogenics |
| 1000 2 1/2CBM | C/1 Advisory reference — outside the item-of-supply concept Ashcroft Inc Dba Heise |
NSN 6685-01-075-6715 is a Gage,compound Pressure-Vacuum,di, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-075-6715 has 1 manufacturer part number on file: 25-1000H-01B-30HG0/30PSI (Ashcroft Inc Dba Heise).
1 possible match (shared part number, not a government interchangeability claim): 4330-01-389-0458. Verify interchangeability with system specifications before substitution.
Key specifications for 25-1000H-01B-30HG0/30PSI: Scale Accuracy: 2 PCT MIDDLE 3RD OF RANGE 3 PCT REMAINDER; Scale Name: PRESSURE-VACUUM; Overall Diameter: 2.719 INCHES NOMINAL IN; Actuation Type: BOURDON TUBE. 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.