PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

566-3Psychrometer

Belfort Instrument Company · NSN 6685-01-136-2137 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-136-2137 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-136-2137. Primary manufacturer part number: 566-3.
Features
  • Psychrometer — FSC 6685
  • 5 verified cross-references
  • Primary manufacturer: Belfort Instrument Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Psychrometer, cataloged under National Stock Number 6685-01-136-2137, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Belfort Instrument Company. This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NamePsychrometer
FSC / FSG6685 — No Item Name Available (FSG 66)
ManufacturersBelfort Instrument Company (CAGE 82205); Cubic Western Data Sub of Cubic Corp (CAGE 57560); Smiths Detection Inc. Dba Smiths Detection Inc Casc (CAGE 23667); Novalynx Corporation Dba Novalynx Corp (CAGE 0TRC6)
Technical Specifications
ParameterValue
NSN6685-01-136-2137
Primary Part Number566-3
Item NamePsychrometer
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBelfort Instrument Company
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3020-00-021-18345663-8 INTERCHANGEABLE
Gear and Ring Assembly
Eaton Corporation Div Eaton Fluid Power
1650-00-101-77905663 INTERCHANGEABLE
Sleeve,unloading
Eaton Aerospace, Llc Dba Jackson South
2530-00-124-57335663-7 INTERCHANGEABLE
Gear Set,internal and Star
Eaton Corporation Div Eaton Fluid Power
4320-00-189-54355663-4 INTERCHANGEABLE
Gear Rotor Set,rotary Pump
Eaton Corporation Div Eaton Fluid Power
5960-00-193-5132 INTERCHANGEABLE
Electron Tube
3020-00-274-4519205663 INTERCHANGEABLE
Gear,spur
Dana Off Highway Products, Llc
5930-00-328-4175 INTERCHANGEABLE
Switch Assy
2805-00-353-89455663 INTERCHANGEABLE
Connecting Rod,piston
Mitsubishi Caterpillar Forklift America, Inc
2805-00-555-4367113-0088 INTERCHANGEABLE
Ring Set,piston
Cummins Power Generation Inc.
5960-00-617-8930 INTERCHANGEABLE
Electron Tube
Cross-Reference Index
Part NumberManufacturer
566-3 PRIMARY Belfort Instrument Company (USA)
622-0011-1 Cubic Western Data Sub of Cubic Corp (USA)
566-3 Smiths Detection Inc. Dba Smiths Detection Inc Casc (USA)
225-556C Novalynx Corporation Dba Novalynx Corp (USA)
225-566C-A Novalynx Corporation Dba Novalynx Corp (USA)
Related Parts
3020-00-021-1834INTERCHANGEABLE
GEAR AND RING ASSEMBLY
5663-8
1650-00-101-7790INTERCHANGEABLE
SLEEVE,UNLOADING
5663
2530-00-124-5733INTERCHANGEABLE
GEAR SET,INTERNAL AND STAR
5663-7
4320-00-189-5435INTERCHANGEABLE
GEAR ROTOR SET,ROTARY PUMP
5663-4
5960-00-193-5132INTERCHANGEABLE
ELECTRON TUBE
3020-00-274-4519INTERCHANGEABLE
GEAR,SPUR
205663
5930-00-328-4175INTERCHANGEABLE
SWITCH ASSY
2805-00-353-8945INTERCHANGEABLE
CONNECTING ROD,PISTON
5663
2805-00-555-4367INTERCHANGEABLE
RING SET,PISTON
113-0088
5960-00-617-8930INTERCHANGEABLE
ELECTRON TUBE
5340-00-970-2740INTERCHANGEABLE
PLUG
566-3
3120-01-288-1228INTERCHANGEABLE
BEARING,WASHER,THRUST

Frequently Asked Questions

What is NSN 6685-01-136-2137?

NSN 6685-01-136-2137 is a Psychrometer, manufactured by Belfort Instrument Company, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-136-2137?

NSN 6685-01-136-2137 has 5 cross-referenced part numbers: 566-3 (Belfort Instrument Company), 622-0011-1 (Cubic Western Data Sub of Cubic Corp), 566-3 (Smiths Detection Inc. Dba Smiths Detection Inc Casc), 225-556C (Novalynx Corporation Dba Novalynx Corp), 225-566C-A (Novalynx Corporation Dba Novalynx Corp).

What NSN replaces 6685-01-136-2137?

There are 12 known substitutes for 6685-01-136-2137: 3020-00-021-1834, 1650-00-101-7790, 2530-00-124-5733 and 9 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com