The Thermowell, cataloged under National Stock Number 6685-01-475-0046, 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 Carrier Corp. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6685-01-475-0046 |
| Primary Part Number | 90C01-8522 |
| Item Name | Thermowell |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Carrier Corp |
| Status | ACTIVE |
| Style Designator | PLAIN, INTERNAL THREADED |
| Bulb Tip Outside Diameter | 3.000 INCHES NOMINAL IN |
| Straight Bore Depth | 3.250 INCHES NOMINAL ALL BORES IN |
| Internal Thread Size | 3/8 IN NPT ALL BORES IN |
| Bore Inside Diameter | 0.375 INCHES NOMINAL ALL BORES IN |
| 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 |
|---|---|
| 90C01-8522 PRIMARY | Carrier Corp (USA) |
| 90C01-8522 | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| 22-020-175 | 5/9 Secondary reference Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| 9A-001-00-B4 ITEM NO. 11 | D/9 Drawing number reference only Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
NSN 6685-01-475-0046 is a Thermowell, manufactured by Carrier Corp, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-475-0046 has 2 manufacturer part numbers on file: 90C01-8522 (Carrier Corp), 90C01-8522 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
Key specifications for 90C01-8522: Style Designator: PLAIN, INTERNAL THREADED; Overall Length: 3.500 INCHES NOMINAL3.500 INCHES NOMINAL IN; Bulb Tip Outside Diameter: 3.000 INCHES NOMINAL IN; Straight Bore Depth: 3.250 INCHES NOMINAL ALL BORES IN. 5 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.