The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-384-0442, 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 Engineered Specialty Products, Inc.. Government technical data includes 20 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-384-0442 |
| Primary Part Number | PRO-303L-254O |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Engineered Specialty Products, Inc. |
| Status | ACTIVE |
| Scale Accuracy | 1.0FULL SCALE |
| Scale Name | PRESSURE |
| Actuation Type | BOURDON TUBE |
| Mounting Connection Location | BOTTOM |
| Mounting Method | PANEL |
| Scale Inscription/background Color | WHITE BACKGROUND WITH BLACK MARKINGS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 2000.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Scale Name for Which Pointer Is Designed | PRESSURE |
| Pointer Type | INDICATING |
| Scale Type | DIAL |
| Dial Size | 2 1/2 INCH DIAL IN |
| Connection Location | BACK, LOWER |
| Pointer Color | BLACK |
| Surface Treatment | PAINT EPOXY CASE |
| Material | GLASS PROTECTIVE CRYSTAL |
| Material | STEEL CORROSION RESISTING CASE |
| Material | STEEL CORROSION RESISTING ACTUATING ELEMENT |
| Connection Quantity | 1 |
| Connection Size | 0.250 INCH 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 |
|---|---|
| PRO-303L-254O PRIMARY | Engineered Specialty Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| DR063-452.233/022E | 5/9 Secondary reference Engineered Specialty Products, Inc. |
| DR063/453.233/22E | 5/9 Secondary reference Haenni Instruments Inc |
| MEX3-G51-H32 | 5/9 Secondary reference Engineered Specialty Products, Inc. |
| DR063-452.233022E | 5/9 Secondary reference Haenni Instruments Inc |
NSN 6685-01-384-0442 is a Gage,pressure,dial Indicating, manufactured by Engineered Specialty Products, Inc., classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-384-0442 has 1 manufacturer part number on file: PRO-303L-254O (Engineered Specialty Products, Inc.).
Key specifications for PRO-303L-254O: Scale Accuracy: 1.0FULL SCALE; Scale Name: PRESSURE; Actuation Type: BOURDON TUBE; Mounting Connection Location: BOTTOM. 20 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.