The Thermowell, cataloged under National Stock Number 6685-01-541-9151, 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 Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Thermowell |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (CAGE 38450) |
| Parameter | Value |
|---|---|
| NSN | 6685-01-541-9151 |
| Primary Part Number | 22-020-111 |
| Item Name | Thermowell |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| 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 |
|---|---|
| 22-020-111 | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| 1401C0300 FIND NO. 27 | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| MIL-T-24270/13B | 3/9 Design control — primary reference Alloy Engineering & Casting Company Dba Alloy Engineering & Casting |
| MIL-T-24270B/13 | 5/9 Secondary reference Alloy Engineering & Casting Company Dba Alloy Engineering & Casting |
| 1401C0300 | D/9 Drawing number reference only Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
NSN 6685-01-541-9151 is a Thermowell, manufactured by Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-541-9151 has 2 manufacturer part numbers on file: 22-020-111 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil), 1401C0300 FIND NO. 27 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
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.