The Thermocouple,immersion, cataloged under National Stock Number 6685-00-237-2721, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-237-2721 |
| Item Name | Thermocouple,immersion |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 EXTERNAL PIPE CONNECTION |
| Mounting Facility Screw Thread Series Designator | NPT |
| Mounting Thread Quantity | 27 PER INCH |
| Immersion Length | 1.000 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN |
| Mounting Facility Nominal Screw Thread Diameter | 0.125 INCHES IN |
| Unit Type | PROTECTIVE TUBE |
| Material | IRON PROTECTIVE TUBE |
| Terminal Type and Quantity | 2 TERMINAL LUG |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 391-664-003 | 3/9 Design control — primary reference Dresser-Rand Holdings, Llc Dba Dresser-Rand Div Olean Operations |
NSN 6685-00-237-2721 is a Thermocouple,immersion, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
Key specifications for 6685-00-237-2721: Mounting Facility Type and Quantity: 1 EXTERNAL PIPE CONNECTION; Mounting Facility Screw Thread Series Designator: NPT; Overall Length: 49.750 INCHES NOMINAL IN; Mounting Thread Quantity: 27 PER INCH. 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.