The Thermostat,flow Control, cataloged under National Stock Number 6685-01-028-3978, 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 Komatsu America Corp.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-028-3978 |
| Primary Part Number | 419661C1 |
| Item Name | Thermostat,flow Control |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Komatsu America Corp. |
| Status | ACTIVE |
| Mounting Method | FLANGE |
| Operating Temp Rating | 170.0 FAHRENHEIT NOMINAL DEGF |
| Usage Design | CONTROL ENGINE TEMPERATURE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 419661C1 | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 419661C1 | 3/9 Design control — primary reference Komatsu American Intl Co |
| 419661C1 | 5/9 Secondary reference U.S. Government activity |
NSN 6685-01-028-3978 is a Thermostat,flow Control, manufactured by Komatsu America Corp., classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-028-3978 has 1 manufacturer part number on file: 419661C1 (Komatsu America Corp.).
Key specifications for 419661C1: Mounting Method: FLANGE; Operating Temp Rating: 170.0 FAHRENHEIT NOMINAL DEGF; Usage Design: CONTROL ENGINE TEMPERATURE. 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.