The Barometer,aneroid, cataloged under National Stock Number 6685-01-552-7593, 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 Mcmaster-Carr Supply Co. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 6685-01-552-7593 |
| Primary Part Number | 4109K3 |
| Item Name | Barometer,aneroid |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Overall Diameter | 4.750 INCHES NOMINAL IN |
| Mounting Method | WALL |
| Usage Design | USED IN WEATHER FORECASTING, DETERMINING ELEVATION AND MONITOR ATMOSPHERIC PRESSURE CHANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4109K3 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 241 2V5074109K3 | C/1 Advisory reference — outside the item-of-supply concept Mcmaster-Carr Supply Company |
NSN 6685-01-552-7593 is a Barometer,aneroid, manufactured by Mcmaster-Carr Supply Co, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-552-7593 has 1 manufacturer part number on file: 4109K3 (Mcmaster-Carr Supply Co).
Key specifications for 4109K3: Overall Diameter: 4.750 INCHES NOMINAL IN; Mounting Method: WALL; End Item Identification: RADAR TPS-77; Usage Design: USED IN WEATHER FORECASTING, DETERMINING ELEVATION AND MONITOR ATMOSPHERIC PRESSURE CHANGE. 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.
NSN 6685-01-552-7593 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.