The Gage,differential,dial Indicatin, cataloged under National Stock Number 6685-01-240-4644, 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 Astra Associates Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-240-4644 |
| Primary Part Number | 120AC-00-00 0-30 PSID |
| Item Name | Gage,differential,dial Indicatin |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Astra Associates Inc |
| Status | ACTIVE |
| Scale Accuracy | 2 TO 3 PCT FULL RANGE |
| Scale Name | DIFFERENTIAL PRESSURE |
| Actuation Type | PISTON |
| Mounting Method | SURFACE |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND |
| Scale Smallest Increment | 1.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | INTERNAL |
| Scale Range | +0.0 TO 30.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2-1/2 IN. DIA IN |
| Graduation Unit | 5.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | BACK |
| Pointer Color | BLACK |
| Material | PLASTIC CASE |
| Material | STEEL CORROSION RESISTING ACTUATING ELEMENT |
| Material | PLASTIC PROTECTIVE CRYSTAL |
| Connection Quantity | 2 |
| 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 |
|---|---|
| 120AC-00-00 0-30 PSID PRIMARY | Astra Associates Inc (USA) |
| K-500-2007 PRIMARY | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| 120AZ-00-00 | 5/9 Secondary reference Astra Associates Inc |
| 120AZ-00-00 0/30 PSI | 5/9 Secondary reference Astra Associates Inc |
NSN 6685-01-240-4644 is a Gage,differential,dial Indicatin, manufactured by Astra Associates Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-240-4644 has 2 manufacturer part numbers on file: 120AC-00-00 0-30 PSID (Astra Associates Inc), K-500-2007 (Kovatch Corp.).
Key specifications for 120AC-00-00 0-30 PSID: Scale Accuracy: 2 TO 3 PCT FULL RANGE; Scale Name: DIFFERENTIAL PRESSURE; Actuation Type: PISTON; Mounting Method: SURFACE. 21 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.