The Gage,compound Pressure-Vacuum,di, cataloged under National Stock Number 6685-01-075-3731, 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 Bellofram Corporation. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-075-3731 |
| Primary Part Number | H2024 |
| Item Name | Gage,compound Pressure-Vacuum,di |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Bellofram Corporation |
| Status | ACTIVE |
| Scale Accuracy | 1 PCT ENTIRE RANGE |
| Scale Name | PRESSURE-VACUUM |
| Overall Diameter | 4.859 INCHES NOMINAL IN |
| Actuation Type | BOURDON TUBE |
| Mounting Connection Location | BACK |
| Mounting Method | CLAMP AND FLUSH |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND |
| Scale Smallest Increment | 10.0 INCHES OF MERCURY (INHG) AND 5.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 30.0 INCHES OF MERCURY AND +0.0 TO 300.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Scale Name for Which Pointer Is Designed | PRESSURE-VACUUM |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 3-1/2 IN. DIA IN |
| Graduation Unit | 30.0 INCHES OF MERCURY AND 30.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | LOWER BACK |
| Pointer Color | BLACK |
| Surface Treatment | ENAMEL CASE |
| Material | BRASS ACTUATING ELEMENT |
| Material | GLASS PROTECTIVE CRYSTAL |
| Material | STEEL ALLOY CASE |
| Connection Quantity | 1 |
| Bezel Type | SLIPS-ON |
| Connection Size | 0.250 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 |
|---|---|
| H2024 PRIMARY | Bellofram Corporation (USA) |
| Reference | Meaning |
|---|---|
| H2024 | 5/9 Secondary reference Desco Corp Marsh Bellofram Div |
NSN 6685-01-075-3731 is a Gage,compound Pressure-Vacuum,di, manufactured by Bellofram Corporation, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-075-3731 has 1 manufacturer part number on file: H2024 (Bellofram Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-579-9136. Verify interchangeability with system specifications before substitution.
Key specifications for H2024: Scale Accuracy: 1 PCT ENTIRE RANGE; Scale Name: PRESSURE-VACUUM; Overall Diameter: 4.859 INCHES NOMINAL IN; Actuation Type: BOURDON TUBE. 26 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.