The Thermocouple,heating Element, cataloged under National Stock Number 6685-01-591-9478, 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 The Electric Heater Co Dba Hubbell Electric Heater Co.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6685-01-591-9478 |
| Primary Part Number | 6ES72317PD220XA0 |
| Item Name | Thermocouple,heating Element |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | The Electric Heater Co Dba Hubbell Electric Heater Co. |
| Status | ACTIVE |
| Type/model Designation | MODEL EM231 |
| 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 |
|---|---|
| 6ES72317PD220XA0 PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| 17764PLC PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| Reference | Meaning |
|---|---|
| 6ES72317PD220XA0 | 5/1 Secondary reference Siemens Energy and Automation Inc Automation Products Div |
| 17764-3-29 | 5/9 Secondary reference The Electric Heater Co Dba Hubbell Electric Heater Co. |
NSN 6685-01-591-9478 is a Thermocouple,heating Element, manufactured by The Electric Heater Co Dba Hubbell Electric Heater Co., classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-591-9478 has 2 manufacturer part numbers on file: 6ES72317PD220XA0 (The Electric Heater Co Dba Hubbell Electric Heater Co.), 17764PLC (The Electric Heater Co Dba Hubbell Electric Heater Co.).
Key specifications for 6ES72317PD220XA0: Part Name Assigned by Controlling Agency: THERMOCOUPLE,INPUT MODULE EM231,(4)THERMOCOUPLE INPUTS; Type/model Designation: MODEL EM231. 1 specification is 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.