PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21700-1Sensor,ambient Temperature

Rdf Corporation · NSN 6685-01-077-5259 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-077-5259 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-077-5259. Primary manufacturer part number: 21700-1.
Features
  • Sensor,ambient Temperature — FSC 6685
  • 12 verified cross-references
  • Primary manufacturer: Rdf Corporation
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Sensor,ambient Temperature, cataloged under National Stock Number 6685-01-077-5259, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Rdf Corporation. This item has 12 commercial cross-references from 6 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
NSN6685-01-077-5259
Primary Part Number21700-1
Item NameSensor,ambient Temperature
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerRdf Corporation
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6685-00-574-8877 INTERCHANGEABLE
Thermocouple Assembly
6685-01-064-5525 INTERCHANGEABLE
Thermocouple Assembly
6685-01-119-5560 INTERCHANGEABLE
Transmitter,temperature,electric
6685-01-148-9914 INTERCHANGEABLE
Pyrometer,recording
6685-01-152-4156 INTERCHANGEABLE
Thermocouple,immersion
5999-01-155-032506-1602-2216 INTERCHANGEABLE
Panel,radio Frequency-Electromag
Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division
6685-01-212-8046 INTERCHANGEABLE
Thermocouple Assembly
5920-01-213-638523411-006 INTERCHANGEABLE
Fuse,cartridge
Viavi Solutionsllc
5999-01-228-3098640024-1 INTERCHANGEABLE
Contact,electrical
Te Connectivity Corporation
5998-01-314-2061 INTERCHANGEABLE
Circuit Card Assembly
Cross-Reference Index
Part NumberManufacturer
21700-1 Rdf Corporation (USA)
104YT-4 Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas (USA)
104-774 REV J-104YT-4 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
RTE-P-4-2TW Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
104TY4 Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas (USA)
104YT-4 Rosemount Inc Dba Fisher Rosemount Service and Support (USA)
63A104935P2 Lockheed Martin Corporation Div Rotary and Mission Systems (USA)
6685PL1295463 Jednolity Indeks Materialowy - Uniform Material Index (POL)
104-774 REV J-104YT-4 Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas (USA)
640024-1 Rdf Corporation (USA)
63A104935P3 Lockheed Martin Corporation Div Rotary and Mission Systems (USA)
Related Parts
6685-00-574-8877INTERCHANGEABLE
THERMOCOUPLE ASSEMBLY
6685-01-064-5525INTERCHANGEABLE
THERMOCOUPLE ASSEMBLY
6685-01-119-5560INTERCHANGEABLE
TRANSMITTER,TEMPERATURE,ELECTRIC
6685-01-148-9914INTERCHANGEABLE
PYROMETER,RECORDING
6685-01-152-4156INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
5999-01-155-0325INTERCHANGEABLE
PANEL,RADIO FREQUENCY-ELECTROMAG
06-1602-2216
6685-01-212-8046INTERCHANGEABLE
THERMOCOUPLE ASSEMBLY
5920-01-213-6385INTERCHANGEABLE
FUSE,CARTRIDGE
23411-006
5999-01-228-3098INTERCHANGEABLE
CONTACT,ELECTRICAL
640024-1
5998-01-314-2061INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
6685-01-336-5072INTERCHANGEABLE
THERMOCOUPLE,HEATING ELEMENT
6685-01-354-4433INTERCHANGEABLE
THERMOCOUPLE,IMMERSION

Frequently Asked Questions

What is NSN 6685-01-077-5259?

NSN 6685-01-077-5259 is a Sensor,ambient Temperature, manufactured by Rdf Corporation, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-01-077-5259?

NSN 6685-01-077-5259 has 12 cross-referenced part numbers: 21700-1 (Rdf Corporation), 104YT-4 (Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas), 104-774 REV J-104YT-4 (Rosemount Inc Dba Fisher Rosemount Service and Support), MIL-T-24388 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), RTE-P-4-2TW (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 7 more.

What NSN replaces 6685-01-077-5259?

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

What are the specifications of 21700-1?

Key specifications for 21700-1: End Item Identification: L.P. COMPRESSOR; ELECTRIC POWER GENERATION SYS, COMMUNICATIONS AND DATA SYSTEMS. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-01-077-5259 still in active supply?

NSN 6685-01-077-5259 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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