The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-934-7953, 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 Bellofram Corporation. Government technical data includes 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-934-7953 |
| Primary Part Number | H1254 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Bellofram Corporation |
| Status | ACTIVE |
| Mounting Hole Quantity | 3 |
| Scale Accuracy | PORM 1 PCT MIDDLE HALF OF SCALE |
| Scale Name | PRESSURE |
| Overall Diameter | 4.875 INCHES NOMINAL IN |
| Actuation Type | BOURDON TUBE |
| Mounting Method | FLANGE |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND |
| Scale Smallest Increment | 5.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 200.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Mounting Hole Diameter | 0.219 INCHES NOMINAL IN |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 3-1/2 IN. DIA IN |
| Graduation Unit | 20.0 POUNDS PER SQUARE INCH LBS |
| Bolt Circle Diameter | 4.312 INCHES NOMINAL IN |
| Connection Location | BOTTOM |
| Color | BLACK CASE |
| Pointer Color | BLACK |
| Surface Treatment | DICHROMATE AND ENAMEL CASE |
| Material | STEEL CASE |
| Material | GLASS PROTECTIVE CRYSTAL |
| Material | COPPER ALLOY ACTUATING ELEMENT |
| Connection Quantity | 1 |
| Bezel Type | SLIPS-ON |
| 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 |
|---|---|
| H1254 PRIMARY | Bellofram Corporation (USA) |
| Reference | Meaning |
|---|---|
| H1254 | 5/9 Secondary reference Desco Corp Marsh Bellofram Div |
| S1697 | 5/9 Secondary reference The Gorman-Rupp Company Div Gorman-Rupp |
NSN 6685-00-934-7953 is a Gage,pressure,dial Indicating, manufactured by Bellofram Corporation, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-934-7953 has 1 manufacturer part number on file: H1254 (Bellofram Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-368-1877. Verify interchangeability with system specifications before substitution.
Key specifications for H1254: Mounting Hole Quantity: 3; Scale Accuracy: PORM 1 PCT MIDDLE HALF OF SCALE; Scale Name: PRESSURE; Overall Diameter: 4.875 INCHES NOMINAL IN. 28 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.