The Manometer,aneroid, cataloged under National Stock Number 6685-01-491-0249, 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 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-491-0249 |
| Item Name | Manometer,aneroid |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Scale Accuracy | 0.5 PCT OF FULL SCALE |
| Overall Diameter | 0.906 INCHES NOMINAL IN |
| Mounting Method | PORTABLE METAL CASE |
| 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 |
|---|---|
| 475-3FM | 3/9 Design control — primary reference Dwyer Instruments Inc |
NSN 6685-01-491-0249 is a Manometer,aneroid, 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): 6685-01-705-7584. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-01-491-0249: Overall Height: 6.562 INCHES NOMINAL IN; Scale Accuracy: 0.5 PCT OF FULL SCALE; Overall Diameter: 0.906 INCHES NOMINAL IN; Mounting Method: PORTABLE METAL CASE. 3 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.