The Thermocouple,immersion, cataloged under National Stock Number 6685-01-556-3440, 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 Instruments and Controls, Inc. Dba Instruments & Controls Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 6685-01-556-3440 |
| Primary Part Number | M18 X 1.5 |
| Item Name | Thermocouple,immersion |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Instruments and Controls, Inc. Dba Instruments & Controls Inc |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING THERMOCOUPLE WELL |
| 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 |
|---|---|
| M18 X 1.5 PRIMARY | Instruments and Controls, Inc. Dba Instruments & Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| M18 X 1.5 | 3/9 Design control — primary reference Introl Co Inc |
NSN 6685-01-556-3440 is a Thermocouple,immersion, manufactured by Instruments and Controls, Inc. Dba Instruments & Controls Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-556-3440 has 1 manufacturer part number on file: M18 X 1.5 (Instruments and Controls, Inc. Dba Instruments & Controls Inc).
Key specifications for M18 X 1.5: Part Name Assigned by Controlling Agency: INAVY-THERMOCOUPLE; End Item Identification: ENGINE, MN DSL TRACTION DRIVE,BOB HOPE CLASS; Material: STEEL CORROSION RESISTING THERMOCOUPLE WELL. 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.