The Thermostat,flow Control, cataloged under National Stock Number 6685-01-178-7635, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 2 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-178-7635 |
| Primary Part Number | 11261-2 |
| Item Name | Thermostat,flow Control |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Mounting Method | EAR |
| Functional Description | MONITOR UNIT FOR AVIONICS COOLING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 11261-2 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 11261-1 | 5/9 Secondary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
| 11261-2 | 5/9 Secondary reference United Technologies Corp Hamilton Sundstrand Corp |
| 11261-1 | 5/9 Secondary reference United Technologies Corp Hamilton Sundstrand Corp |
| 68-830111-101 | 5/9 Secondary reference The Boeing Company Div Defense |
| 68-830111-101 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 6685-01-178-7635 is a Thermostat,flow Control, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-178-7635 has 1 manufacturer part number on file: 11261-2 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-492-1975. Verify interchangeability with system specifications before substitution.
Key specifications for 11261-2: Overall Height: 8.000 INCHES NOMINAL IN; Mounting Method: EAR; Special Features: 1.2 INCH LONG FLOW SENSOR ORIFACE IN; Functional Description: MONITOR UNIT FOR AVIONICS COOLING. 2 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 6685-01-178-7635 has DEMIL Code Q. 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.