The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-107-6956, 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 Ametek, Inc. Div Aerospace & Defense. Government technical data includes 30 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-107-6956 |
| Primary Part Number | P844U-2 1/2-0-600 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ametek, Inc. Div Aerospace & Defense |
| Status | ACTIVE |
| Scale Accuracy | 3 PCT OF RANGE |
| Scale Name | POUNDS PRESSURE |
| Overall Diameter | 2.812 INCHES NOMINAL IN |
| Actuation Type | SINGLE BOURDON TUBE |
| Mounting Connection Location | BACK |
| Mounting Method | CLAMP AND THREADED STUD(S) |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND |
| Scale Smallest Increment | 5.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 600.0 POUNDS PER SQUARE INCH LBS |
| Stud Location | BACK |
| Stud Quantity | 2 |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | DIAL |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2 1/2 IN. DIA IN |
| Graduation Unit | 20.0 POUNDS PER SQUARE INCH LBS |
| Bolt Circle Diameter | 2.000 INCHES NOMINAL IN |
| Connection Location | BACK, CENTER |
| Color | BLACK CASE |
| Pointer Color | BLACK |
| Surface Treatment | PAINT EPOXY CASE |
| Material | STEEL CASE |
| Material | COPPER ALLOY 511 ACTUATING ELEMENT |
| Material | PLASTIC PROTECTIVE CRYSTAL |
| Usage Design | INSTRUMENT PANEL |
| Connection Quantity | 1 |
| Bezel Type | THREAD |
| Connection Size | 0.125-27 ANPT |
| 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 |
|---|---|
| P844U0-600-2 1-2 | Ametek, Inc. Div Aerospace & Defense (USA) |
| P844U-2 1/2-0-600 PRIMARY | Ametek, Inc. Div Aerospace & Defense (USA) |
NSN 6685-01-107-6956 is a Gage,pressure,dial Indicating, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-107-6956 has 2 manufacturer part numbers on file: P844U0-600-2 1-2 (Ametek, Inc. Div Aerospace & Defense), P844U-2 1/2-0-600 (Ametek, Inc. Div Aerospace & Defense).
Key specifications for P844U-2 1/2-0-600: Scale Accuracy: 3 PCT OF RANGE; Scale Name: POUNDS PRESSURE; Overall Diameter: 2.812 INCHES NOMINAL IN; Actuation Type: SINGLE BOURDON TUBE. 30 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.