The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-550-3355, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 6685-01-550-3355 |
| Primary Part Number | UA20A4C |
| 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 | 2.0 |
| Scale Name | POUNDS PRESSURE |
| Overall Diameter | 2.000 INCHES NOMINAL IN |
| Actuation Type | PRESSURE SENSING ELEMENT |
| Mounting Connection Location | BACK |
| Scale Inscription/background Color | WHITE |
| Scale Smallest Increment | 1.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Scale Range | +2.0 TO 200.0 BAR AND +0.0 TO 30.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Scale Type | DIAL |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2.0 INCH IN |
| Graduation Unit | 5.0 POUNDS PER SQUARE INCH LBS |
| Pointer Color | BLACK |
| Material | STEEL CASE |
| Material | BRONZE ACTUATING ELEMENT |
| Material | PLASTIC PROTECTIVE CRYSTAL |
| Connection Quantity | 1 |
| 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 |
|---|---|
| UA20A4C PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| UA20A4C | 5/9 Secondary reference Weksler Glass Thermometer Corp |
NSN 6685-01-550-3355 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 6685-01-550-3355 has 1 manufacturer part number on file: UA20A4C (Ashcroft Inc Dba Heise).
Key specifications for UA20A4C: Scale Accuracy: 2.0; Scale Name: POUNDS PRESSURE; Overall Diameter: 2.000 INCHES NOMINAL IN; Actuation Type: PRESSURE SENSING ELEMENT. 17 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.