PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

640-49Edison Thermostat

Unicontrol Inc Hays Cleveland Div · NSN 6665-00-887-9542 · FSC 6665 · No Item Name Available
Verified by PartsTable
NSN 6665-00-887-9542 — this item is cataloged by the U.S. Government under National Stock Number 6665-00-887-9542. Primary manufacturer part number: 640-49.
Features
  • Edison Thermostat — FSC 6665
  • 1 verified cross-reference
  • Primary manufacturer: Unicontrol Inc Hays Cleveland Div
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Edison Thermostat, cataloged under National Stock Number 6665-00-887-9542, is classified within Federal Supply Class 6665 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Unicontrol Inc Hays Cleveland Div. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameEdison Thermostat
FSC / FSG6665 — No Item Name Available (FSG 66)
ManufacturersUnicontrol Inc Hays Cleveland Div (CAGE 27847)
Technical Specifications
ParameterValue
NSN6665-00-887-9542
Primary Part Number640-49
Item NameEdison Thermostat
FSC / FSG6665 / 66 — No Item Name Available
ManufacturerUnicontrol Inc Hays Cleveland Div
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5310-00-022-00811B4331 INTERCHANGEABLE
Nut,plain,hexagon
Caterpillar Inc Div Caterpillar Defense
5360-00-327-081464049 INTERCHANGEABLE
Spring,helical,compression
Hiller Aircraft Corporation
5340-01-205-5711 INTERCHANGEABLE
Plate,mending
5331-01-457-9689 INTERCHANGEABLE
O-Ring
5120-01-581-5833 INTERCHANGEABLE
Wrench,torque
Cross-Reference Index
Part NumberManufacturer
640-49 PRIMARY Unicontrol Inc Hays Cleveland Div (USA)
Related Parts
5310-00-022-0081INTERCHANGEABLE
NUT,PLAIN,HEXAGON
1B4331
5360-00-327-0814INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
64049
5340-01-205-5711INTERCHANGEABLE
PLATE,MENDING
5331-01-457-9689INTERCHANGEABLE
O-RING
5120-01-581-5833INTERCHANGEABLE
WRENCH,TORQUE

Frequently Asked Questions

What is NSN 6665-00-887-9542?

NSN 6665-00-887-9542 is a Edison Thermostat, manufactured by Unicontrol Inc Hays Cleveland Div, classified under FSC 6665 (No Item Name Available). Status: active.

What are the part numbers for NSN 6665-00-887-9542?

NSN 6665-00-887-9542 has 1 cross-referenced part number: 640-49 (Unicontrol Inc Hays Cleveland Div).

What NSN replaces 6665-00-887-9542?

There are 5 known substitutes for 6665-00-887-9542: 5310-00-022-0081, 5360-00-327-0814, 5340-01-205-5711 and 2 more. Verify interchangeability with system specifications before substitution.

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