The Thermowell, cataloged under National Stock Number 6685-01-073-8433, 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 Actrol Parts (qld) Pty Ltd. Government technical data includes 4 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-073-8433 |
| Primary Part Number | WEL14A-603R |
| Item Name | Thermowell |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Actrol Parts (qld) Pty Ltd |
| Status | ACTIVE |
| Style Designator | THREADED STRAIGHT SHANK, LAGGING EXTENSION |
| External Thread Size | 1/2 IN. NPT IN |
| Bulb Tip Length | 5.812 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| WEL14A-603R | Actrol Parts (qld) Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| WEL14A-603R | 3/2 Design control — primary reference U.S. Government activity |
NSN 6685-01-073-8433 is a Thermowell, manufactured by Actrol Parts (qld) Pty Ltd, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-073-8433 has 1 manufacturer part number on file: WEL14A-603R (Actrol Parts (qld) Pty Ltd).
1 possible match (shared part number, not a government interchangeability claim): 4130-01-442-4755. Verify interchangeability with system specifications before substitution.
Key specifications for WEL14A-603R: Style Designator: THREADED STRAIGHT SHANK, LAGGING EXTENSION; Overall Length: 7.874 INCHES NOMINAL IN; External Thread Size: 1/2 IN. NPT IN; Bulb Tip Length: 5.812 INCHES NOMINAL IN. 4 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.