The Thermostat,flow Control, cataloged under National Stock Number 6685-00-333-5348, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 6685-00-333-5348 |
| Primary Part Number | 8F8817 |
| Item Name | Thermostat,flow Control |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Flow Control Device | BY-PASS |
| Spring Operated Pressure Relief | NOT PROVIDED |
| Largest Outside Diameter | 2.925 INCHES MINIMUM AND 2.930 INCHES MAXIMUM IN |
| Valve Travel Distance | 0.310 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Operating Temp Rating | 186.0 FAHRENHEIT NOMINAL DEGF |
| Thermostat Type | SOLID EXPANSION |
| Usage Design | CONTROL ENGINE COOLANT TEMP |
| Opening Temp Rating | 174.0 FAHRENHEIT NOMINAL DEGF |
| 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 |
|---|---|
| 8F8817 | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| VD10355-175 | 3/9 Design control — primary reference Scovill Inc |
NSN 6685-00-333-5348 is a Thermostat,flow Control, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-333-5348 has 1 manufacturer part number on file: 8F8817 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 8F8817: Flow Control Device: BY-PASS; Overall Height: 3.534 INCHES NOMINAL IN; Spring Operated Pressure Relief: NOT PROVIDED; Largest Outside Diameter: 2.925 INCHES MINIMUM AND 2.930 INCHES MAXIMUM IN. 8 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.