The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-491-6587, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-491-6587 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Scale Name | POUNDS PRESSURE |
| Actuation Type | BOURDON TUBE |
| Mounting Method | FLUSH PANEL |
| Scale Smallest Increment | 1.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 100.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Pointer Type | INDICATING |
| Adjustability | NONADJUSTABLE |
| Scale Type | DIAL |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 4.5IN IN |
| Graduation Unit | 10.0 POUNDS PER SQUARE INCH LBS |
| Connection Location | BACK, LOWER |
| Pointer Color | ANY ACCEPTABLE |
| Material | STEEL CORROSION RESISTING ACTUATING ELEMENT |
| Connection Quantity | 1 |
| Connection Size | 7/16-20 FLARELESS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| EA24-3PFF-RWBO | 5/1 Secondary reference Weksler Glass Thermometer Corp |
| SA24-3PFF-RWBO | 5/1 Secondary reference Weksler Glass Thermometer Corp |
| G27-80 | 5/1 Secondary reference Weksler Glass Thermometer Corp |
| EA24-3PFF-RWBO | 5/1 Secondary reference Ashcroft Inc Dba Heise |
| SG4NC1HPWCANAG | 2/2 Government specification standardization U.S. Government activity |
| MIL-G-18997 | 4/1 Identification reference U.S. Government activity |
NSN 6685-01-491-6587 is a Gage,pressure,dial Indicating, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6685-01-502-8409. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-01-491-6587: Scale Name: POUNDS PRESSURE; Actuation Type: BOURDON TUBE; Mounting Method: FLUSH PANEL; Scale Smallest Increment: 1.0 POUNDS PER SQUARE INCH (PSI) LBS. 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.