The Gage,compound Pressure-Vacuum,di, cataloged under National Stock Number 6685-00-252-0562, 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 Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-252-0562 |
| Primary Part Number | 66610371AA-1 |
| Item Name | Gage,compound Pressure-Vacuum,di |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Scale Accuracy | 2 PCT ACCURACY RATING MIDDLE HALF OF RANGE,3 PCT REMAINDER |
| Scale Name | PRESSURE AND VACUUM |
| Overall Diameter | 2.718 INCHES NOMINAL IN |
| Actuation Type | SINGLE BOURDON TUBE |
| Mounting Method | RIGID STEM |
| Scale Inscription/background Color | BLACK FIGURES ON WHITE BACKGROUND |
| Scale Smallest Increment | 0.5 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 | NONADJUSTABLE |
| Scale Type | MULTIPLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2-1/2 DIA |
| Graduation Unit | 2.0 INCHES AND 5.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | LOWER |
| Pointer Color | BLACK |
| Surface Treatment | POLISHED CASE |
| Unable to Decode | UNABLE TO DECODE |
| Material | BRASS CASE |
| Material | BRONZE ACTUATING ELEMENT |
| Material | PLASTIC PROTECTIVE CRYSTAL |
| 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 |
|---|---|
| 66610371AA-1 PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 6660371 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 66610371AA-1 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 66610371AA-1 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 25C500R30X30 | 5/9 Secondary reference Ametek, Inc. Div Aerospace & Defense |
| 137727 | 5/9 Secondary reference Ametek, Inc. Div Aerospace & Defense |
NSN 6685-00-252-0562 is a Gage,compound Pressure-Vacuum,di, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-252-0562 has 1 manufacturer part number on file: 66610371AA-1 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-510-0257. Verify interchangeability with system specifications before substitution.
Key specifications for 66610371AA-1: Scale Accuracy: 2 PCT ACCURACY RATING MIDDLE HALF OF RANGE,3 PCT REMAINDER; Scale Name: PRESSURE AND VACUUM; Overall Diameter: 2.718 INCHES NOMINAL IN; Actuation Type: SINGLE 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.