The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-179-4591, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-179-4591 |
| Primary Part Number | 45-1279ASL-02L-0-200 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Scale Accuracy | PORM 1/2 PCT FULL RANGE |
| Scale Name | POUNDS PRESSURE |
| Overall Diameter | 5.812 INCHES NOMINAL IN |
| Actuation Type | BOURDON TUBE |
| Mounting Connection Location | BOTTOM |
| Mounting Method | THREADED STEM |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND |
| Scale Smallest Increment | 2.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 200.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 4-1/2 IN. DIA IN |
| Graduation Unit | 20.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | BOTTOM |
| Color | BLACK CASE |
| Pointer Color | BLACK |
| Surface Treatment | PAINT EPOXY CASE |
| Material | GLASS PROTECTIVE CRYSTAL |
| Material | COPPER ALLOY 511 ACTUATING ELEMENT |
| Material | PLASTIC AND PLASTIC POLYPROPYLENE AND PLASTIC PHENOLIC CASE |
| Connection Quantity | 1 |
| Bezel Type | THREAD |
| 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 |
|---|---|
| 45-1279ASL-02L-0-200 PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| 3920449 | 5/9 Secondary reference Brooks Automation, Inc. Div Cti Cryogenics |
NSN 6685-01-179-4591 is a Gage,pressure,dial Indicating, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-179-4591 has 1 manufacturer part number on file: 45-1279ASL-02L-0-200 (Ashcroft Inc Dba Heise).
1 possible match (shared part number, not a government interchangeability claim): 4710-01-369-5041. Verify interchangeability with system specifications before substitution.
Key specifications for 45-1279ASL-02L-0-200: Scale Accuracy: PORM 1/2 PCT FULL RANGE; Scale Name: POUNDS PRESSURE; Overall Diameter: 5.812 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.