The Thermostat,flow Control, cataloged under National Stock Number 6685-00-377-8943, 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 Rolls-Royce Solutions America Inc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-377-8943 |
| Primary Part Number | 5104238 |
| Item Name | Thermostat,flow Control |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Flow Control Device | CHOKE |
| Spring Operated Pressure Relief | NOT PROVIDED |
| Largest Outside Diameter | 2.878 INCHES NOMINAL IN |
| Mounting Method | FLANGE |
| Valve Travel Distance | 0.310 INCHES NOMINAL IN |
| Operating Temp Rating | 186.0 FAHRENHEIT NOMINAL DEGF |
| Thermostat Type | SOLID EXPANSION |
| Usage Design | CONTROL ENGINE COOLANT TEMP |
| Opening Temp Rating | 172.0 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 |
|---|---|
| VD103B1 | Vernatherm Llc (USA) |
| 5104238 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| 4A302-002 | Standard-Thomson Corporation (USA) |
| D11750 | Caltherm Corp (USA) |
| Reference | Meaning |
|---|---|
| RC26-47-9210 | 5/2 Secondary reference U.S. Government activity |
| 5178833 | 5/9 Secondary reference General Motors Corp |
| 302-170 | 5/9 Secondary reference Standard-Thomson Corporation |
| 5178833 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 5104238 | 5/1 Secondary reference Terex Equipment Ltd Div Construction Equipment |
| 5178833 | 5/9 Secondary reference Rolls-Royce Solutions America Inc |
NSN 6685-00-377-8943 is a Thermostat,flow Control, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-377-8943 has 4 manufacturer part numbers on file: VD103B1 (Vernatherm Llc), 5104238 (Rolls-Royce Solutions America Inc), 4A302-002 (Standard-Thomson Corporation), D11750 (Caltherm Corp).
1 possible match (shared part number, not a government interchangeability claim): 4030-01-615-1506. Verify interchangeability with system specifications before substitution.
Key specifications for 5104238: Flow Control Device: CHOKE; Overall Height: 3.063 INCHES NOMINAL IN; Spring Operated Pressure Relief: NOT PROVIDED; Largest Outside Diameter: 2.878 INCHES NOMINAL IN. 9 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.