PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

370584Thermocouple,immersion

Service & Sales Inc · NSN 6685-00-551-4811 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-551-4811 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-551-4811. Primary manufacturer part number: 370584.
Features
  • Thermocouple,immersion — FSC 6685
  • Immersion Length: 3.400 INCHES NOMINAL IN
  • Unit Type: PROTECTIVE TUBE
  • Terminal Type and Quantity: 2 STUD
  • Material: MAGNESIUM ALLOY INDIVIDUAL WIRE INSULATION
  • Accommodated Wire Awg Size: 18
  • Operating Temp Range: -400.0 TO 1400.0 FAHRENHEIT DEGF
  • Plate Width: 0.937 INCHES NOMINAL IN
Applications
  • Applications requiring Magnesium Alloy Individual Wire Insulation construction
General Description

The Thermocouple,immersion, cataloged under National Stock Number 6685-00-551-4811, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Service & Sales Inc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 9 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
NSN6685-00-551-4811
Primary Part Number370584
Item NameThermocouple,immersion
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerService & Sales Inc
StatusCANCELLED
Immersion Length3.400 INCHES NOMINAL IN
Unit TypePROTECTIVE TUBE
Terminal Type and Quantity2 STUD
MaterialMAGNESIUM ALLOY INDIVIDUAL WIRE INSULATION
Accommodated Wire Awg Size18
Operating Temp Range-400.0 TO 1400.0 FAHRENHEIT DEGF
Plate Width0.937 INCHES NOMINAL IN
Plate Length2.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3455-00-021-2409 INTERCHANGEABLE
File,rotary
5133-00-061-627410911 INTERCHANGEABLE
Drill,twist
Precision Twist Drill Co
5306-00-147-651312775 INTERCHANGEABLE
Bolt,machine
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
1730-00-232-968412775 INTERCHANGEABLE
Pin,link to Knuckle
Time Manufacturing Company Dba Time Manufacturing Company
6940-00-300-2192 INTERCHANGEABLE
Fourth Wheel Reroll
5330-00-367-2188365-00074 INTERCHANGEABLE
Seal,oil
Johnson Controls Navy Systems, Llc
5365-00-614-306312775 INTERCHANGEABLE
Shim
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
6750-00-664-0325 INTERCHANGEABLE
Paper,photographic
6145-00-870-1041T5405 INTERCHANGEABLE
Cable,power,electrical
Prysmian Cables and Systems Usa, Llc Div Manufacturing Plant
6520-00-935-414812775 INTERCHANGEABLE
File,pulp Canal,dental
Kerr Corporation
Cross-Reference Index
Part NumberManufacturer
6574 Unison Industries, Llc Dba Unison Industries Inc (USA)
370854-M Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
PS370854 Alliedsignal Inc Dba Allied-Signal Aerospace Co (USA)
370854-N Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
PS370854 Acme Air Appliance Co Inc Div of Ideal Corp (USA)
370854 Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
PS370854 Honeywell International Inc. Div Aerospace - Torrance (USA)
370854 Alliedsignal Inc Dba Allied-Signal Aerospace Co (USA)
370584 PRIMARY Service & Sales Inc (USA)
12775 The B G Service Company, Inc. (USA)
6574 Unison Industries Llc (USA)
5610704TYPET85-1 General Motors Llc Dba General Motors (USA)
Related Parts
3455-00-021-2409INTERCHANGEABLE
FILE,ROTARY
5133-00-061-6274INTERCHANGEABLE
DRILL,TWIST
10911
5306-00-147-6513INTERCHANGEABLE
BOLT,MACHINE
12775
1730-00-232-9684INTERCHANGEABLE
PIN,LINK TO KNUCKLE
12775
6940-00-300-2192INTERCHANGEABLE
FOURTH WHEEL REROLL
5330-00-367-2188INTERCHANGEABLE
SEAL,OIL
365-00074
5365-00-614-3063INTERCHANGEABLE
SHIM
12775
6750-00-664-0325INTERCHANGEABLE
PAPER,PHOTOGRAPHIC
6145-00-870-1041INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
T5405
6520-00-935-4148INTERCHANGEABLE
FILE,PULP CANAL,DENTAL
12775
4820-01-087-8157INTERCHANGEABLE
VALVE,DIAPHRAGM,STOP
12775
5950-01-101-0841INTERCHANGEABLE
REACTOR
12775

Frequently Asked Questions

What is NSN 6685-00-551-4811?

NSN 6685-00-551-4811 is a Thermocouple,immersion, manufactured by Service & Sales Inc, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-551-4811?

NSN 6685-00-551-4811 has 12 cross-referenced part numbers: 6574 (Unison Industries, Llc Dba Unison Industries Inc), 370854-M (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), PS370854 (Alliedsignal Inc Dba Allied-Signal Aerospace Co), 370854-N (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), PS370854 (Acme Air Appliance Co Inc Div of Ideal Corp) and 7 more.

What NSN replaces 6685-00-551-4811?

There are 12 known substitutes for 6685-00-551-4811: 3455-00-021-2409, 5133-00-061-6274, 5306-00-147-6513 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 370584?

Key specifications for 370584: Immersion Length: 3.400 INCHES NOMINAL IN; Unit Type: PROTECTIVE TUBE; Terminal Type and Quantity: 2 STUD; Material: MAGNESIUM ALLOY INDIVIDUAL WIRE INSULATION. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-551-4811 still in active supply?

NSN 6685-00-551-4811 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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