PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8T1204B3Thermocouple,immersion

Horizon Aerospace Llc Dba Magnetics Division · NSN 6685-00-048-7931 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-048-7931 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-048-7931. Primary manufacturer part number: 8T1204B3.
Features
  • Thermocouple,immersion — FSC 6685
  • Material: ASBESTOS INDIVIDUAL WIRE INSULATION
  • Material: FIBERGLASS OUTER JACKET INSULATION/SHEATHING
  • Immersion Length: 2.750 INCHES NOMINAL IN
  • Unit Type: EXPOSED LOOP
  • Accommodated Wire Awg Size: 16
  • Terminal Type and Quantity: 2 LUG
  • Mounting Facility Type and Quantity: 1 BAYONET
Applications
  • Applications requiring Asbestos Individual Wire Insulation construction
General Description

The Thermocouple,immersion, cataloged under National Stock Number 6685-00-048-7931, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Horizon Aerospace Llc Dba Magnetics Division. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 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
NSN6685-00-048-7931
Primary Part Number8T1204B3
Item NameThermocouple,immersion
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerHorizon Aerospace Llc Dba Magnetics Division
StatusCANCELLED
MaterialASBESTOS INDIVIDUAL WIRE INSULATION
MaterialFIBERGLASS OUTER JACKET INSULATION/SHEATHING
Immersion Length2.750 INCHES NOMINAL IN
Unit TypeEXPOSED LOOP
Accommodated Wire Awg Size16
Terminal Type and Quantity2 LUG
Mounting Facility Type and Quantity1 BAYONET
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6650-00-107-8509 INTERCHANGEABLE
Refractometer
5945-00-193-0089 INTERCHANGEABLE
Flasher,thermal
5310-00-209-3871 INTERCHANGEABLE
Washer,lock
2920-00-364-0940127-9 INTERCHANGEABLE
Lever,contact Point
Dresser Industries Inc Leroi Div
3020-00-657-6764104-30 INTERCHANGEABLE
Gear,spur
Southern Gear & Machine Inc
5310-00-721-7810 INTERCHANGEABLE
Washer,lock
5915-00-723-2056 INTERCHANGEABLE
Filter,radio Frequency Interfere
2910-00-737-2538116881 INTERCHANGEABLE
Valve Needle
Am General Llc
3110-00-918-789410430 INTERCHANGEABLE
Bearing
Kone Inc.
5820-01-063-340210430 INTERCHANGEABLE
Control,remote
Harris Corporation Div Microwave Communication Division
Cross-Reference Index
Part NumberManufacturer
8T1204B3 PRIMARY Horizon Aerospace Llc Dba Magnetics Division (USA)
11688-1 Rtx Corporation Div Pratt & Whitney (USA)
4C21R Rtx Corporation Div Pratt & Whitney (USA)
13470-1 The B G Service Company, Inc. (USA)
10103 Thermo Electric Company Inc. Dba Thermo Electric Company (USA)
10430 Thermo Electric Company Inc. Dba Thermo Electric Company (USA)
Related Parts
6650-00-107-8509INTERCHANGEABLE
REFRACTOMETER
5945-00-193-0089INTERCHANGEABLE
FLASHER,THERMAL
5310-00-209-3871INTERCHANGEABLE
WASHER,LOCK
2920-00-364-0940INTERCHANGEABLE
LEVER,CONTACT POINT
127-9
3020-00-657-6764INTERCHANGEABLE
GEAR,SPUR
104-30
5310-00-721-7810INTERCHANGEABLE
WASHER,LOCK
5915-00-723-2056INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
2910-00-737-2538INTERCHANGEABLE
VALVE NEEDLE
116881
3110-00-918-7894INTERCHANGEABLE
BEARING
10430
5820-01-063-3402INTERCHANGEABLE
CONTROL,REMOTE
10430
4730-01-280-8216INTERCHANGEABLE
SLEEVE,FLARED,TUBE FITTING
6130-01-314-4083INTERCHANGEABLE
POWER SUPPLY
10430

Frequently Asked Questions

What is NSN 6685-00-048-7931?

NSN 6685-00-048-7931 is a Thermocouple,immersion, manufactured by Horizon Aerospace Llc Dba Magnetics Division, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-048-7931?

NSN 6685-00-048-7931 has 6 cross-referenced part numbers: 8T1204B3 (Horizon Aerospace Llc Dba Magnetics Division), 11688-1 (Rtx Corporation Div Pratt & Whitney), 4C21R (Rtx Corporation Div Pratt & Whitney), 13470-1 (The B G Service Company, Inc.), 10103 (Thermo Electric Company Inc. Dba Thermo Electric Company) and 1 more.

What NSN replaces 6685-00-048-7931?

There are 12 known substitutes for 6685-00-048-7931: 6650-00-107-8509, 5945-00-193-0089, 5310-00-209-3871 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8T1204B3?

Key specifications for 8T1204B3: Material: ASBESTOS INDIVIDUAL WIRE INSULATION; Material: FIBERGLASS OUTER JACKET INSULATION/SHEATHING; Overall Length: 13.000 INCHES NOMINAL IN; Immersion Length: 2.750 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-048-7931 still in active supply?

NSN 6685-00-048-7931 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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