The Thermowell, cataloged under National Stock Number 6685-01-677-2483, 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 Omega Engineering, Inc.. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-677-2483 |
| Primary Part Number | 1/2-260S-U161/2-316S |
| Item Name | Thermowell |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Omega Engineering, Inc. |
| Status | ACTIVE |
| Body Diameter | 0.625 INCHES NOMINAL IN |
| Style Designator | THREADED STEPPED SHANK |
| Material Document and Classification | 73428-AISI-316 ASSN STD SINGLE MATERIAL RESPONSE |
| Body Length | 14.0 INCHES NOMINAL IN |
| Bulb Tip Outside Diameter | 0.5 INCHES NOMINAL IN |
| External Thread Size | 1/2 NPT |
| Bulb Tip Length | 2.5 INCHES NOMINAL IN |
| Straight Bore Depth | 18.0 INCHES NOMINAL ALL BORES IN |
| Internal Thread Size | 1/2 INCH NPSM ALL BORES IN |
| Material | STEEL COMP 316 |
| Bore Inside Diameter | 0.26 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 |
|---|---|
| 1/2-260S-U161/2-316S PRIMARY | Omega Engineering, Inc. (USA) |
NSN 6685-01-677-2483 is a Thermowell, manufactured by Omega Engineering, Inc., classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-677-2483 has 1 manufacturer part number on file: 1/2-260S-U161/2-316S (Omega Engineering, Inc.).
Key specifications for 1/2-260S-U161/2-316S: Body Diameter: 0.625 INCHES NOMINAL IN; Style Designator: THREADED STEPPED SHANK; Material Document and Classification: 73428-AISI-316 ASSN STD SINGLE MATERIAL RESPONSE; Overall Length: 18.25 INCHES NOMINAL IN. 11 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.