The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-128-2121, 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 Northrop Grumman Support Services Corp. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-128-2121 |
| Primary Part Number | 342C340H18 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Scale Accuracy | 3-2-3 PERCENT |
| Scale Name | POUNDS PRESSURE |
| Actuation Type | BOURDON TUBE |
| Mounting Connection Location | BOTTOM |
| Mounting Method | RIGID STEM |
| Scale Inscription/background Color | BLACK ON WHITE FACE |
| Scale Smallest Increment | 5.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 60.0 POUNDS PER SQUARE INCH LBS |
| Scale Name for Which Pointer Is Designed | PRESSURE |
| Pointer Type | INDICATING |
| Adjustability | NONADJUSTABLE |
| Scale Type | DIAL |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2 1/2 INCH DIAMETER IN |
| Connection Location | BOTTOM |
| Pointer Color | BLACK |
| Material | BRASS ACTUATING ELEMENT |
| Material | PLASTIC ACRYLONITRILE-BUTADIENE-STYRENE (ABS) CASE |
| Connection Quantity | 1 |
| Bezel Type | BAYONET |
| Connection Size | 1/4 INCH NPT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 342C340H18 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 342C340H18 | 3/9 Design control — primary reference U.S. Government activity |
NSN 6685-01-128-2121 is a Gage,pressure,dial Indicating, manufactured by Northrop Grumman Support Services Corp, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-128-2121 has 1 manufacturer part number on file: 342C340H18 (Northrop Grumman Support Services Corp).
Key specifications for 342C340H18: Scale Accuracy: 3-2-3 PERCENT; Scale Name: POUNDS PRESSURE; Actuation Type: BOURDON TUBE; Mounting Connection Location: BOTTOM. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.