Bulb Tip Outside Diameter: 0.500 INCHES NOMINAL IN
Bulb Tip Length: 2.500 INCHES NOMINAL IN
Material: STEEL CORROSION RESISTING
Identification
NSN: 6685-01-229-3389
NIIN: 012293389
FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
General Description
The Thermowell, cataloged under National Stock Number 6685-01-229-3389, 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 4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6685-01-229-3389
Item Name
Thermowell
FSC / FSG
6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Status
ACTIVE
Style Designator
THREADED STRAIGHT SHANK, LAGGING EXTENSION
Bulb Tip Outside Diameter
0.500 INCHES NOMINAL IN
Bulb Tip Length
2.500 INCHES NOMINAL IN
Material
STEEL CORROSION RESISTING
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
138-0143.4
3/9Design control — primary reference
H O Trerice Co
76-4G6
5/9Secondary reference
H O Trerice Co
No interchangeability data on file.
Other items in FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6685-00-001-1475
6685-00-001-1475 · Item name not on file
6685-00-001-1503
CONTROL,TOTALIZER
6685-00-001-1643
6685-00-001-1643 · Item name not on file
6685-00-001-1711
GAGE,PRESSURE,DIAL INDICATING
6685-00-001-2099
6685-00-001-2099 · Item name not on file
6685-00-001-2100
6685-00-001-2100 · Item name not on file
6685-00-001-2101
6685-00-001-2101 · Item name not on file
6685-00-001-2102
6685-00-001-2102 · Item name not on file
Frequently Asked Questions
What is NSN 6685-01-229-3389?
NSN 6685-01-229-3389 is a Thermowell, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
What are the specifications of 6685-01-229-3389?
Key specifications for 6685-01-229-3389: Style Designator: THREADED STRAIGHT SHANK, LAGGING EXTENSION; Bulb Tip Outside Diameter: 0.500 INCHES NOMINAL IN; Bulb Tip Length: 2.500 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING. 4 specifications are documented in the U.S. Government catalog.
Is NSN 6685-01-229-3389 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.