PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ICSS-18-G-6Thermocouple,immersion

Omega Engineering, Inc. · NSN 6685-01-501-6699 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-501-6699 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-501-6699. Primary manufacturer part number: ICSS-18-G-6.
Features
  • Thermocouple,immersion — FSC 6685
  • Material: STEEL COMP 304 OUTER JACKET INSULATION/SHEATHING
  • Terminal Type and Quantity: 2 CONNECTOR, PLUG
  • Reference Data and Literature: OMEGA INSTRUMENTS CATALOG
  • Material: COPPER ALLOY AND IRON THERMOCOUPLE WIRE
  • Material: CERAMIC INDIVIDUAL WIRE INSULATION
  • Accommodated Wire Awg Size: 18
  • Operating Temp Range: -210.0 TO 760.0 CELSIUS DEGC
Applications
  • Applications requiring Steel Comp 304 Outer Jacket Insulation/sheathing construction
General Description

The Thermocouple,immersion, cataloged under National Stock Number 6685-01-501-6699, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Omega Engineering, Inc.. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-501-6699
Primary Part NumberICSS-18-G-6
Item NameThermocouple,immersion
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerOmega Engineering, Inc.
StatusACTIVE
MaterialSTEEL COMP 304 OUTER JACKET INSULATION/SHEATHING
Terminal Type and Quantity2 CONNECTOR, PLUG
Reference Data and LiteratureOMEGA INSTRUMENTS CATALOG
MaterialCOPPER ALLOY AND IRON THERMOCOUPLE WIRE
MaterialCERAMIC INDIVIDUAL WIRE INSULATION
Accommodated Wire Awg Size18
Operating Temp Range-210.0 TO 760.0 CELSIUS DEGC
Immersion Length6.000 INCHES NOMINAL IN
Features ProvidedMALE CONNECTOR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5310-00-020-035921NE108 INTERCHANGEABLE
Nut,self-Locking,hexagon
Esna, Llc
6685-00-449-257221966 INTERCHANGEABLE
Cup-Field
Prestolite Electric Inc
5315-01-691-469721966 INTERCHANGEABLE
Pin,straight,headed
Tulsa Winch, Inc.
Cross-Reference Index
Part NumberManufacturer
ICSS-18-G-6 PRIMARY Omega Engineering, Inc. (USA)
21966 Itw Gse Inc. (USA)
21966 Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems (USA)
Related Parts
5310-00-020-0359INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
21NE108
6685-00-449-2572INTERCHANGEABLE
CUP-FIELD
21966
5315-01-691-4697INTERCHANGEABLE
PIN,STRAIGHT,HEADED
21966

Frequently Asked Questions

What is NSN 6685-01-501-6699?

NSN 6685-01-501-6699 is a Thermocouple,immersion, manufactured by Omega Engineering, Inc., classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-501-6699?

NSN 6685-01-501-6699 has 3 cross-referenced part numbers: ICSS-18-G-6 (Omega Engineering, Inc.), 21966 (Itw Gse Inc.), 21966 (Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems).

What NSN replaces 6685-01-501-6699?

There are 3 known substitutes for 6685-01-501-6699: 5310-00-020-0359, 6685-00-449-2572, 5315-01-691-4697. Verify interchangeability with system specifications before substitution.

What are the specifications of ICSS-18-G-6?

Key specifications for ICSS-18-G-6: End Item Identification: F-22 AIRCRAFT; Material: STEEL COMP 304 OUTER JACKET INSULATION/SHEATHING; Terminal Type and Quantity: 2 CONNECTOR, PLUG; Reference Data and Literature: OMEGA INSTRUMENTS CATALOG. 13 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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