PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21C2778P10Thermocouple,immersion

General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp · NSN 6685-00-903-6799 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-903-6799 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-903-6799. Primary manufacturer part number: 21C2778P10.
Features
  • Thermocouple,immersion — FSC 6685
  • Material: CERAMIC INDIVIDUAL WIRE INSULATION
  • Material: STEEL CORROSION RESISTING OUTER JACKET INSULATION/SHEATHING
  • Terminal Type and Quantity: 1 CONNECTOR, PLUG
  • Immersion Length: 1.530 INCHES NOMINAL IN
  • Unit Type: PROTECTIVE TUBE
  • Mounting Facility Nominal Screw Thread Diameter: 0.375 INCHES IN
  • Mounting Facility Screw Thread Series Designator: UNF
Applications
  • Applications requiring Ceramic Individual Wire Insulation construction
General Description

The Thermocouple,immersion, cataloged under National Stock Number 6685-00-903-6799, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-903-6799
Primary Part Number21C2778P10
Item NameThermocouple,immersion
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerGeneral Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp
StatusACTIVE
MaterialCERAMIC INDIVIDUAL WIRE INSULATION
MaterialSTEEL CORROSION RESISTING OUTER JACKET INSULATION/SHEATHING
Terminal Type and Quantity1 CONNECTOR, PLUG
Immersion Length1.530 INCHES NOMINAL IN
Unit TypePROTECTIVE TUBE
Mounting Facility Nominal Screw Thread Diameter0.375 INCHES IN
Mounting Facility Screw Thread Series DesignatorUNF
Accommodated Wire Awg Size20
Mounting Thread Quantity24 PER INCH
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5133-00-189-9294 INTERCHANGEABLE
Drill,twist
5136-00-197-95677254 INTERCHANGEABLE
Die,rethreading
Stanley Tools Div of Stanley Works
5930-00-296-9793 INTERCHANGEABLE
Switch,sensitive
6110-01-166-385824144 INTERCHANGEABLE
Starter,motor
Ward Leonard Ct Llc
6695-01-299-4713 INTERCHANGEABLE
Prom Board Assembly
5945-01-611-424624214 INTERCHANGEABLE
Solenoid,electrical
Cole Hersee Company
4730-01-611-446324144 INTERCHANGEABLE
Plug,pipe
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
21C2778P10 PRIMARY General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp (USA)
21C2778P010 General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp (USA)
21C2778P010 General Electric Company (USA)
21C2778P010 Rhinestahl Corporation Dba Rhinestahl (USA)
21C2778P10 Rhinestahl Corporation Dba Rhinestahl (USA)
24144 Thermo Electric Company Inc. Dba Thermo Electric Company (USA)
21C2778P010 General Electric Company Dba Ge Aerospace (USA)
Related Parts
5133-00-189-9294INTERCHANGEABLE
DRILL,TWIST
5136-00-197-9567INTERCHANGEABLE
DIE,RETHREADING
7254
5930-00-296-9793INTERCHANGEABLE
SWITCH,SENSITIVE
6110-01-166-3858INTERCHANGEABLE
STARTER,MOTOR
24144
6695-01-299-4713INTERCHANGEABLE
PROM BOARD ASSEMBLY
5945-01-611-4246INTERCHANGEABLE
SOLENOID,ELECTRICAL
24214
4730-01-611-4463INTERCHANGEABLE
PLUG,PIPE
24144

Frequently Asked Questions

What is NSN 6685-00-903-6799?

NSN 6685-00-903-6799 is a Thermocouple,immersion, manufactured by General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-903-6799?

NSN 6685-00-903-6799 has 7 cross-referenced part numbers: 21C2778P10 (General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp), 21C2778P010 (General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp), 21C2778P010 (General Electric Company), 21C2778P010 (Rhinestahl Corporation Dba Rhinestahl), 21C2778P10 (Rhinestahl Corporation Dba Rhinestahl) and 2 more.

What NSN replaces 6685-00-903-6799?

There are 7 known substitutes for 6685-00-903-6799: 5133-00-189-9294, 5136-00-197-9567, 5930-00-296-9793 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21C2778P10?

Key specifications for 21C2778P10: Material: CERAMIC INDIVIDUAL WIRE INSULATION; Material: STEEL CORROSION RESISTING OUTER JACKET INSULATION/SHEATHING; Terminal Type and Quantity: 1 CONNECTOR, PLUG; Immersion Length: 1.530 INCHES NOMINAL IN. 10 total characteristics are documented in the Federal Logistics Information System.

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