The Thermostat,flow Control, cataloged under National Stock Number 6685-01-044-3476, 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3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-044-3476 |
| Item Name | Thermostat,flow Control |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Largest Outside Diameter | 2.063 INCHES NOMINAL IN |
| Thermostat Type | BELLOWS |
| Usage Design | FRESH WATER COOLING-ENGINE |
| 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 |
|---|---|
| 59137 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6685-01-044-3476 is a Thermostat,flow Control, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-047-3224, 3040-01-678-2367. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-01-044-3476: Largest Outside Diameter: 2.063 INCHES NOMINAL IN; Thermostat Type: BELLOWS; Usage Design: FRESH WATER COOLING-ENGINE. 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.