The Thermostat,flow Control, cataloged under National Stock Number 6685-01-209-2103, 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 Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-209-2103 |
| Primary Part Number | 157231-4 |
| Item Name | Thermostat,flow Control |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Spring Operated Pressure Relief | PROVIDED |
| Largest Outside Diameter | 0.880 INCHES NOMINAL IN |
| Mounting Method | THREADED |
| Closing Pressure Setting | 30.0 POUNDS PER SQUARE INCH NOMINAL LBS |
| Operating Temp Rating | 150.0 FAHRENHEIT NOMINAL DEGF |
| Thermostat Type | COIL SPRING BIMETALLIC |
| Opening Pressure Setting | ERR-060 |
| Usage Design | USED W/OIL IN ENGINE |
| Distance Across Flats | 1.250 INCHES NOMINAL IN |
| Opening Temp Rating | 30.0 FAHRENHEIT NOMINAL DEGF |
| 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 |
|---|---|
| 157231-4 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
NSN 6685-01-209-2103 is a Thermostat,flow Control, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-209-2103 has 1 manufacturer part number on file: 157231-4 (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for 157231-4: Spring Operated Pressure Relief: PROVIDED; Largest Outside Diameter: 0.880 INCHES NOMINAL IN; Mounting Method: THREADED; Closing Pressure Setting: 30.0 POUNDS PER SQUARE INCH NOMINAL LBS. 10 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 6685-01-209-2103 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.