PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3590302Thermocouple Assembly

Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco · NSN 6685-01-064-5525 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-064-5525 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-064-5525. Primary manufacturer part number: 3590302.
Features
  • Thermocouple Assembly — FSC 6685
  • Precious Material and Location: RESISTANCE SENSOR PLATINUM
  • Precious Material and Weight: 0.040 PLATINUM GRAINS, TROY
  • Precious Material: PLATINUM
  • General Characteristics Item Description: MAXIMUMOPERATING TEMP 400DEG FAHRENHEIT; OVERALL LENGTH 6-11/16 IN. NOMINAL IN
  • 9 verified cross-references
  • Primary manufacturer: Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermocouple Assembly, cataloged under National Stock Number 6685-01-064-5525, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-01-064-5525
Primary Part Number3590302
Item NameThermocouple Assembly
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerColtec Industries Inc Dba Fairbanks Morse Engine Fm/alco
StatusCANCELLED
Precious Material and LocationRESISTANCE SENSOR PLATINUM
Precious Material and Weight0.040 PLATINUM GRAINS, TROY
Precious MaterialPLATINUM
General Characteristics Item DescriptionMAXIMUMOPERATING TEMP 400DEG FAHRENHEIT; OVERALL LENGTH 6-11/16 IN. NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6685-00-574-8877 INTERCHANGEABLE
Thermocouple Assembly
6685-01-077-5259 INTERCHANGEABLE
Sensor,ambient Temperature
6685-01-119-5560 INTERCHANGEABLE
Transmitter,temperature,electric
6685-01-148-9914 INTERCHANGEABLE
Pyrometer,recording
6685-01-152-4156 INTERCHANGEABLE
Thermocouple,immersion
6685-01-212-8046 INTERCHANGEABLE
Thermocouple Assembly
6685-01-336-5072 INTERCHANGEABLE
Thermocouple,heating Element
6685-01-354-4433 INTERCHANGEABLE
Thermocouple,immersion
6685-01-368-7059 INTERCHANGEABLE
Thermocouple,immersion
6685-01-393-9024 INTERCHANGEABLE
Thermocouple,immersion
Cross-Reference Index
Part NumberManufacturer
3590302 Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco (USA)
805556-0-01 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
RTE-P-6-2TW Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
805556-0-01 Electric Boat Corp Dba Electro Dynamic (USA)
10-4T6 11-16XT Rosemount Inc Dba Fisher Rosemount Service and Support (USA)
MIL-T-24388 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
104YT-6 Rosemount Inc Dba Fisher Rosemount Service and Support (USA)
104YT-6 Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas (USA)
6685PL0959475 Jednolity Indeks Materialowy - Uniform Material Index (POL)
Related Parts
6685-00-574-8877INTERCHANGEABLE
THERMOCOUPLE ASSEMBLY
6685-01-077-5259INTERCHANGEABLE
SENSOR,AMBIENT TEMPERATURE
6685-01-119-5560INTERCHANGEABLE
TRANSMITTER,TEMPERATURE,ELECTRIC
6685-01-148-9914INTERCHANGEABLE
PYROMETER,RECORDING
6685-01-152-4156INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
6685-01-212-8046INTERCHANGEABLE
THERMOCOUPLE ASSEMBLY
6685-01-336-5072INTERCHANGEABLE
THERMOCOUPLE,HEATING ELEMENT
6685-01-354-4433INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
6685-01-368-7059INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
6685-01-393-9024INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
6685-01-393-9027INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
6685-01-431-1454INTERCHANGEABLE
THERMOCOUPLE ASSEMBLY

Frequently Asked Questions

What is NSN 6685-01-064-5525?

NSN 6685-01-064-5525 is a Thermocouple Assembly, manufactured by Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-01-064-5525?

NSN 6685-01-064-5525 has 9 cross-referenced part numbers: 3590302 (Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco), 805556-0-01 (Electric Boat Corporation Div General Dynamics Electric Boat), RTE-P-6-2TW (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 805556-0-01 (Electric Boat Corp Dba Electro Dynamic), 10-4T6 11-16XT (Rosemount Inc Dba Fisher Rosemount Service and Support) and 4 more.

What NSN replaces 6685-01-064-5525?

There are 12 known substitutes for 6685-01-064-5525: 6685-00-574-8877, 6685-01-077-5259, 6685-01-119-5560 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3590302?

Key specifications for 3590302: Precious Material and Location: RESISTANCE SENSOR PLATINUM; Precious Material and Weight: 0.040 PLATINUM GRAINS, TROY; Precious Material: PLATINUM; General Characteristics Item Description: MAXIMUMOPERATING TEMP 400DEG FAHRENHEIT; OVERALL LENGTH 6-11/16 IN. NOMINAL IN. 4 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-01-064-5525 still in active supply?

NSN 6685-01-064-5525 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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