The Gage,compound Pressure-Vacuum,di, cataloged under National Stock Number 6685-01-532-0664, 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 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-532-0664 |
| Primary Part Number | EA24-3CQP-RWBO |
| 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 | +/- 1.0 PERCENT |
| Scale Name | PRESSURE-VACUUM |
| Overall Diameter | 5.875 INCHES NOMINAL IN |
| Actuation Type | BOURDON TUBE |
| Scale Inscription/background Color | WHITE BACKGROUND WITH BLACK NUMERALS AND GRUDATIONS |
| Scale Range | +0.0 TO 36.0 INCHES OF MERCURY ABSOLUTE PRESSURE AND +0.0 TO 15.0 POUNDS PER SQUARE INCH LBS |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | DIAL |
| Dial Size | 4.5" |
| Connection Location | BACK |
| Pointer Color | BLACK |
| Surface Treatment | ENAMEL CASE |
| Material | ALUMINUM CASE |
| Connection Quantity | 1 |
| Connection Size | 9/16-18 UNF-3A UNION "O" RING TYPE, WIHT "O" RING, TAILPIECE, UNION NUT A |
| 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 |
|---|---|
| EA24-3CQP-RWBO PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| SA24-3CQP-RWBO | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| MIL-G-18997E | 5/9 Secondary reference U.S. Government activity |
NSN 6685-01-532-0664 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 6685-01-532-0664 has 1 manufacturer part number on file: EA24-3CQP-RWBO (Ashcroft Inc Dba Heise).
Key specifications for EA24-3CQP-RWBO: Scale Accuracy: +/- 1.0 PERCENT; Scale Name: PRESSURE-VACUUM; Overall Diameter: 5.875 INCHES NOMINAL IN; Actuation Type: BOURDON TUBE. 16 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.