Bulb Tip Outside Diameter: 0.625 INCHES NOMINAL IN
External Thread Size: 1 IN. NPT1 IN. NPT IN
Bulb Tip Length: 2.562 INCHES NOMINAL IN
Internal Thread Size: 1 1/4 IN. NPT ALL BORES IN
Material: COPPER ALLOY
Identification
NSN: 6685-00-245-4541
NIIN: 002454541
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 6685-00-245-4541, 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 6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6685-00-245-4541
Item Name
Thermowell
FSC / FSG
6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Status
ACTIVE
Style Designator
THREADED STRAIGHT SHANK
Bulb Tip Outside Diameter
0.625 INCHES NOMINAL IN
External Thread Size
1 IN. NPT1 IN. NPT IN
Bulb Tip Length
2.562 INCHES NOMINAL IN
Internal Thread Size
1 1/4 IN. NPT ALL BORES IN
Material
COPPER ALLOY
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
GG-T-321
4/1Identification reference
U.S. Government activity
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 6685-00-245-4541?
NSN 6685-00-245-4541 is a Thermowell, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
What are the specifications of 6685-00-245-4541?
Key specifications for 6685-00-245-4541: Style Designator: THREADED STRAIGHT SHANK; Overall Length: 8.875 INCHES NOMINAL8.875 INCHES NOMINAL IN; Bulb Tip Outside Diameter: 0.625 INCHES NOMINAL IN; External Thread Size: 1 IN. NPT1 IN. NPT IN. 6 specifications are documented in the U.S. Government catalog.
Is NSN 6685-00-245-4541 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.